_Spicules._ Skeleton-spicules smooth, slender, sharply pointed at both ends, nearly straight. No true flesh-spicules. Gemmule-spicules straight or nearly so, cylindrical, or constricted in the middle, obscurely pointed or blunt, clothed with short, sharp, straight spines, which are very numerous but not markedly longer at the two ends; these spicules frequently found free in the parenchyma. _Gemmules_ numerous, small, free, spherical, yellow, with a well-developed granular coat (in which the spicules are arranged almost horizontally) and external to it a fine membrane which in preserved specimens becomes puckered owing to unequal contraction; each gemmule with a single aperture provided with a straight, rather wide, but very delicate foraminal tubule. _Measurements of Spicules and Gemmules._ Length of skeleton-spicule 0.313 mm. Breadth of skeleton-spicule 0.012 " Length of gemmule-spicule 0.062 " Breadth of gemmule-spicule 0.004 " Diameter of gemmule 0.313-0.365 mm. This sponge in its general structure bears a very close resemblance to _Spongilla crateriformis_. TYPE in the collection of the Indian Museum. HABITAT. Growing on weeds at the edge of the Sur Lake, Orissa, October 1908. Only one specimen was taken, together with many examples of _S. lacustris_ subsp. _reticulata_, _S. carteri_ and _S. crassissima_. 7. Spongilla crateriformis* (_Potts_). _Meyenia crateriforma_, Potts, P. Ac. Philad. 1882, p. 12. _Meyenia crateriformis, id., ibid._ 1887, p. 228, pl. v, fig. 6, pl. x, fig. 5. ? _Ephydatia crateriformis_, Hanitsch, Nature, ii, p. 511 (1895). _Ephydatia crateriformis_, Weltner, Arch. Naturg. lxi (i), pp. 122, 134 (1895). ? _Ephydatia crateriformis_, Hanitsch, Irish Natural. iv, p. 125, pl. iv, fig. 5 (1895). _Ephydatia indica_, Annandale, J. Asiat. Soc. Bengal, 1907, p. 20 (figures poor). _Ephydatia indica, id._, Rec. Ind. Mus. i, pp. 272, 279, 388, 391 (1907). _Ephydatia crateriformis_, Scharff, European Animals, p. 34 (1907). _Ephydatia crateriformis_, Annandale, P. U.S. Mus. xxxvii, p. 402, fig. 1 (1909). _Sponge_ very fragile, forming soft irregular masses on the roots and stems of water-plants, between which it is sometimes stretched as a delicate film, or thin layers or cushions on flat surfaces. Oscula large, flat, circular, or of irregular shape, opening into broad horizontal canals, which at their distal end are superficial and often covered by the external membrane only. Colour white, yellowish, greyish, or blackish. _Skeleton_ very delicate; radiating fibres rarely consisting of more than two parallel spicules; transverse fibres far apart, frequently consisting of single spicules; very little spongin present. [Illustration: Fig 13.--Spicules of _Spongilla crateriformis_.