88 Mr. H. J. Carter 07i the 



dark brown. Structure fibrous. Skeleton-spicule (PI. VI. 

 fig. 14) curved, fusiform, gradually sharp-pointed, smooth, 

 sometimes more or less spiniferous. Flesh-spicule thin, 

 curved, fusiform, gradually sharp-pointed, spined throughout. 

 Statoblast when fully developed globular ; aperture infundi- 

 bular; crust composed of granular cell-structure, charged 

 with more or less curved, minute, stout, fusiform, sharp- 

 pointed acerates covered with stout recurved spines, arranged 

 tangentially or centrifugally, like the lines of a so-called 

 " engine-turned " watch-case. 



Loc. England and Europe generally ; North America ; 

 Asia, Lake Baikal [Dyhowski). 



5. Spongilla alha. Carter. 



Spmgilla alba, Carter, No. 12, p. 83, pi. iii. fig. 4 ; also No. 20, p. 25, 

 pi. xxxviii. fig. 16, 



Massive, spreading, subbranched. Structure fragile, to- 

 mentosc. Colour whitish. Skeleton-spicule curved, fusiform, 

 gradually sharp-pointed, smooth. Flesh-spicule thin, curved, 

 fusiform, covered with spines, longest in the centre, where 

 they are vertical and obtuse. Statoblast globular ; aperture 

 infundibular ; crust thick, white, composed of granular cell- 

 structure charged with minute, thick acerates, which are 

 curved, cylindrical, round at the ends, covered with spines 

 (especially about the extremities, where they are longest and 

 much recurved), arranged tangentially, intercrossing each other 

 like the lines of an engine-turned watch-case. 



Loc. Bombay. 



Ohs. The spicules of the statoblast here, as well as in 

 Spongilla lacustris, are considerably stouter, more curved, 

 cylindrical, and more coarsely spined than the flesh-spicules 

 of the sponge generally. 



6. Spongilla cerehellata, Bk. 

 Spongilla cerehellata, No. 20, p. 27, pi. xxxviii. fig. 16. 



This Spongilla^ which appears to me to be only a variety 

 of the foregoing species, differs from it chiefly in the absence 

 of the " flesh-spicule," in addition to what Dr. Bowerbank has 

 mentioned (I. c). 



Loc. Central India, Aurungabad. 



7. Spongilla multiforis *, Carter, n. sp. 

 (PI. V. fig. 5, a-d.) 



Massive, incrusting. Colour dark brown. Structure fra- 



* mtdtiforis, with many doors or opening;* (in allusion to the plurality 

 of the " apertures "). 



