Division IV. PALUDICELLINA, nov.

The zooecia are arranged in a regular cruciform manner and arise either directly one from another or with the intervention of tubular processes.

If the polypide has a gizzard it does not bear internal chitinous projections. Most of the species are confined to fresh water, but a few are found in brackish water or even in the sea.

Although all true freshwater Ctenostomes belong to the fourth of these divisions, species of a genus (_Bowerbankia_) included in the third are so frequently found in brackish water and in a.s.sociation with one belonging to the fourth, and are so easily confounded with the latter, that I think it necessary to include a brief description of the said genus and of the form that represents it in ponds of brackish water in India.

SYSTEMATIC LIST OF THE INDIAN FRESHWATER POLYZOA.

[The types have been examined in the case of all species, etc., whose names are marked thus, *.]

Order I. GYMNOLaeMATA.

Suborder I. _CTENOSTOMATA._

[Division III. Vesicularina.]

[Genus BOWERBANKIA, Farre (1837).]

[_B. caudata_ subsp. _bengalensis_*, Annandale (1907).

(Brackish water).]

Division IV. Paludicellina, nov.

Family I. PALUDICELLIDae.

Genus 1. PALUDICELLA, Gervais (1836).

? _Paludicella_ sp. (_fide_ Carter).

Genus 2. VICTORELLA, Kent (1870).

26._V. bengalensis_*, Annandale (1907).

Family II. HISLOPIIDae.

Genus HISLOPIA, Carter (1858).

27. _H. lacustris_, Carter (1858).

27 _a._ _H. lacustris_ subsp. _moniliformis_*, nov.

Order II. PHYLACTOLaeMATA.

Division I. Plumatellina.

Family 1. FREDERICELLIDae.

Genus FREDERICELLA, Gervais (1836).

28. _F. indica_*, Annandale (1909).

Family 2. PLUMATELLIDae.

Subfamily A. PLUMATELLINae.

Genus 1. PLUMATELLA, Lamarck (1816).

29. _P. fruticosa_, Allman (1844).

30. _P. emarginata_, Allman (1844).

31. _P. javanica_*, Kraepelin (1905).

32. _P. diffusa_, Leidy (1851).

33. _P. allmani_, Hanc.o.c.k (1850).

34. _P. tanganyikae_*, Rousselet (1907).

35. _P. punctata_, Hanc.o.c.k (1850).

Genus 2. STOLELLA, Annandale (1909).

36. _S. indica_*, Annandale (1909).

Subfamily B. LOPHOPINae.

Genus 1. LOPHOPODELLA, Rousselet (1904).

37. _L. carteri_* (Hyatt) (1865).

37 _a._ _L. carteri_ var. _himalayana_* (Annandale) (1907).

Genus 2. PECTINATELLA, Leidy (1851).

38. _P. burmanica_*, Annandale (1908).

Order CTENOSTOMATA.

[Division VESICULARINA.

Family VESICULARIDae.

VESICULARIDae, Hincks, Brit. Marine Polyzoa, p. 512 (1880).

Zooecia constricted at the base, deciduous, attached to a stem that is either rec.u.mbent or vertical.