1887.] NATURAL SCIENCES OF I'HILADELrillA. 197 



(10) Spongilla botryoides, W. A. Has^well. Pioe. Linn. Soc. X. S. M'^ales, 1SH2, 

 I'. 209. 



"Sponge yellow, encrusting; skeleton st)iciiles curved, fusiform, 

 sparsely microspined ; statoblast spicules short, strongly curved, 

 with heads composed of numerous short, blunt or subacute spines. 

 •Shaft free from spines." Haswell. 



Loc. Pond near Brisbane, Australia. 



(11) Spongilla sceptrioides, W. A. IliiHwcll. Proc-. Linn. Soc. X. S. Wales, 18.S2, 

 p. 209. 



"Skeleton spicules micros{)ined ; statoblast spicules cylindrical, 

 spined, particularly near the head." 

 Loc. Pond near Brisbane, Australia. 



(12) Spongilla cinerea, Carter. Ann. and. Mag. ISSI, ^i. 107. 



"Flat, spreading ; surface slightly convex, })resenting gentle emi- 

 nences and depressions. Color cinereous ; texture compact, fine, 

 friable. Skeleton spicule curved, fusiform, gradually sharp-pointed, 

 minutely spined. Statoblast globular; aperture infundibular; 

 crust thick, white, composed of microcell substance, charged with 

 minute acerate spicules which are curved, cylindrical, abruptly 

 sharp-pointed, and coarsely spined throughout ; arranged more or 

 less tangentially, intercrossing." Carter. 



Loc. Bombay. 



'13) Spongilla fragilis, Leidy. ( I'i. V, tig. ii .- PI. VIII. figs, i, ii. iii, iv.) Proe. 

 Acad. Nat. Sci. Phila. 1851, j.. 27S. 



Syn. — European, See Vejdovsky, "Diagnosis." p. 176. 

 Syn. — American. 



1868 S. lordii, Bowerbank. 

 1875 S. ottawaensis, Dawson. 

 1880 *S^. morgiana, Potts. 



S. calunieti, B. W. Thomas. 

 1880 S.fragUh, var. mimtta, Potts. 

 1880 S. fragilis, var. minutissima, Potts. 



S. fragilis, var. irregularis, Potts. 



S. segregata, Potts. 



Sponge "discoidal, lichenoid, growing in patches flat, oval or cir- 

 cular, lobate at margin, translucent, yellowish white or cream col- 

 ored. Areolse distinct, subcircular. Reproductive bodies arranged 

 in a single close layer at the base of the attachment of the sponge ; 

 shining whitish yellow, elevated into a central papilla upon the up- 

 per surface. 



