Mr. H. J. Carter on the Animality of Freshwater Sponges. 303 
the thorax, convex above, distinctly punctate-striate, the punc- 
tures rather large, remote, angulated, the lateral interstices 
tuberculated, obsoletely rugose on the back, totally black and 
shining. Body black beneath, granulated and cinereo-pubescent 
anteriorly ; abdomen punctulated. Legs rather long, stout, black ; 
femora robust, clavate, simple ; tibise pilose ; tarsi dilated, piceous, 
clothed beneath with a flavescent pulvillus. Length 5 lines. 
This insect may be placed in the genus next to Otiorhynchus 
tenehricosuSj to which it is nearly related. 
I have a foreign specimen of Ot. ebeninus of Schonherr from 
Germar. 
Four specimens of this insect, which is new to the British 
fauna, were found by Mr. B. N. Greville on the west highlands 
of Scotland, to whose liberality I am indebted for a specimen. 
XXXI. — Notes on the Species y Structure, and Animality of the 
Freshwater Sponges in the Tanks of Bombay. [Genus Spon- 
gilla.) By II. J. Carter, Esq., Assistant Surgeon*. 
There arefourf species of Freshwater Sponges in the Tanks of 
Bombay, each of which is readily distinguished by tlie following 
characters : — 
Two are known from the other two by the peculiar form of 
the spicula which encrust their seed-like bodies. 
1 . Is darkly cinereous or mouse-coloured when dry, purplish 
under water when alive, encrusting, repent, spreading in circular 
patches when isolated; smooth or interrupted by gentle emi- 
nences on the surface, attaining the thickness of half an inch in 
the centre, oscula tending towards a quincuncial arrangement ; 
texture compact, fine, delicate ; structure rectangularly reticu- 
lated; friable. Seed-like bodies spherical, l-67th of an inch in 
diameter. Spicula of two kinds, large and small ; large spicula 
smooth, slightly curved, pointed at each end, I -80th of an inch 
long; small spicula straight or slightly curved, thickly spini- 
ferous, I-400th of an inch long. 
2. Is of a faintly yellow or bright green colour, encrusting, re- 
pent, spreading in irregular patches on fixed bodies, globular 
when surrounding a floating nucleus ; even or interrupted by 
gentle eminences on the surface when fixed, presenting meander- 
ing ridges and sulci when attached to floating bodies ; attaining 
the thickness of half an inch when fixed, of two inches when 
floating ; texture coarse and open, structure rectangularly reti- 
culated with a suberose crust slightly tenacious. Seed-like 
• Reprinted from the Transactions of the Bombay Medical and Phy- 
sical Society of 1847, and communicated by the Author, 
f See Postscript at p. 310. 
