No. 28.--Near PLATYRHINA.--Native name, PARETT. "Fiddler" of the sealers; Green skate of the settlers. Eye dullish yellow; pupil sea-green, glaring in some lights; teeth transverse, like a file; spiracles two, large, behind the eye, in the same cavity; belly white, terminating at the caudal fin.

Very common in the sheltered bays, close in sh.o.r.e among the weeds. Not eaten by the Aborigines, who greatly abhor them, as they do also the sting-ray. Specimen two feet nine inches and a half long.

(D.) DESCRIPTION AND FIGURES OF FOUR NEW SPECIES OF AUSTRALIAN INSECTS.

BY ADAM WHITE, ESQ. M.E.S.

The four insects here figured and described are, as far as I am aware, new. Petasida, and Tettigarcta are interesting in the shape of the Thorax, differing widely from that in any of the allied genera, while the new species of Eurybrachys and Chrysopa are striking from their colouring and marks.

PETASIDA EPHIPPIGERA, pl. 4. fig. 1.

Thorax much dilated behind, depressed and rounded at the end; the side deeply sinuated behind; head pointed, antennae long; of a yellowish orange; antennae with a few greenish rings, cheek below the eye with a greenish line, head above with a longitudinal greenish line. Thorax with a slight keel down the middle, wrinkled behind of a dusky blueish green, a large patch of an orange colour on each side in front, and a small spot of the same colour on each edge of the produced part at base; elytra orange with numerous black spots, and black at the tip, lower wings pale orange at the base, clouded with black at the tip; abdomen orange, slightly ringed with green; legs orange, with three greenish spots on the outside of the femora of hind legs.

Length 1 inch 9 lines.

Hab. Australia.

CHRYSOPA MACULIPENNIS, pl. 4. fig. 2.

Head red, with a black spot on the crown; antennae short brownish black; thorax hairy; thorax, abdomen, and legs, brownish black. Wings brown, with iridescent hues, the upper with transverse yellowish lines and spots at the base; a long yellowish line parallel to the outer edge at the end, and emitting a whitish spot which reaches the edge, three spots on the apical portion, the two on the outer edge large; basal half lower wings pale, some of the areolets yellowish; a few clouded with brown, tip of the wing yellowish.

Expanse of wings 1 inch 4 1/2 lines.

Hab. Australia.

EURYBRACHYS LAETA, pl. 4, fig. 3.

Head thorax and upper wings of a rich brown colour, the outer edge of the last is deep black, with a transverse yellowish spot just before the middle, the remainder of the edge slightly spotted with black, upper side covered with short blackish hairs; lower wings deep black; abdomen of a bright red, with a round white tuft on the upper side near the end; first two pairs of legs of a deep brown, with some reddish lines; hind legs ferruginous with blackish spines.

Expanse of wings 7 lines.

Hab. Australia.

TETTIGARCTA, n. genus, WHITE. Fam. CICADIDAE.

Head very small in front, blunt; lateral ocelli close to the eyes, s.p.a.ce between them with long hairs.

Prothorax very large, extending back in a rounded form beyond the base of hind wings, the sides sharp pointed, the back very convex and wrinkled.

Body and under parts densely clothed with hair.

This very singular genus differs from all the Stridulantes in the size and shape of the prothorax; in the neuration of the elytra it is allied to PLATYPLEURA (Amyst and Serville) in the size of head and hairiness of body it approaches CARINETA of the same authors. The Pupa, (fig. 5.) differs in the form of fore legs from those of the other Cicada.

TETTIGARCTA TOMENTOSA, pl. 4, fig. 4, and 5 its pupa.

Of a brownish ash colour, the hairs on upper part of body short and deep brown, on the sides and under parts long and grey; prothorax varied with black, in front, two large patches covered with grey hairs, mixed with longer; elytra spotted and varied with brown, wings clear, somewhat ferruginous at the base.

Expanse of wings 3 inches 4 lines.

Hab. Australia.

DESCRIPTION OF TWO NEW INVERTEBRATED ANIMALS FROM AUSTRALIA, BY J. E. GRAY, ESQ., F.R.S.

Lamarck separated the mother-of-pearls sh.e.l.l (MARGARITA) from the swallow-tail muscles (AVICULA) on account of its more orbicular shape.

Other Conchologists have been inclined to unite them, as some of the species of AVICULA approach to the shape of the other genus. The new one just received from Australia, which I am now about to describe, in this respect more resembles the Margarita than any before noticed; yet I am inclined to think that the pearl-sh.e.l.ls deserved to be kept separate, as the cardinal teeth are quite obliterated in the adult sh.e.l.ls, which is not the case with any AVICULAE I am acquainted with; and the young pearl-sh.e.l.ls are furnished with a broad serrated distant leafy fringe, while the AVICULAE are only covered with very closely applied short concentric slightly raised minutely denticulated lamina, forming an epidermal coat on the surface.

1. AVICULA LATA, pl. 6. f. 1.

Sh.e.l.l dark brown; half ovate; broad obliquely truncated, and scarcely notched behind; covered with close regular very thin denticulated concentric lamina, forming a paler external coat. The front ear rather produced, with a distant inferior notch; internally pearly, with a broad brown margin on the lower-edge.

Inhab. North and West coasts of Australia.

2. SPATANGUS ELONGATUS, pl. 6. f. 2.

Body elongate, cordate, with a deep anterior grove and notch; covered above with minute hair-like spines, with scattered very elongated tubular minutely striated spines on the sides; the anterior groves and circ.u.mference of the vent with larger equal hair-like spines on each side; the under surface with a triangular disk of similar spines beneath the vent, and with elongated larger tubular spines.

Inhab. Western Australia.

Having only a single specimen completely covered with spines, it is impossible to describe the form of the ambulacra or the disposition of the tubercles. The lower figures represent the mouth and vent of the animal in detail.

DESCRIPTION OF SOME NEW AUSTRALIAN LEPIDOPTEROUS INSECTS BY EDWARD DOUBLEDAY, ESQ., F.L.S., etc.

THYRIDOPTERYX NIGRESCENS, pl. 5. f. 1.

Head densely clothed with long whitish hairs; thorax and abdomen with black hairs; wings hyaline, the nervures and nervules brown, with a few black scales: base of the anterior and abdominal fold of the posterior more or less covered with black hairs; antennae and legs fuscous brown.

Exp. 10--12 lines.