G. SPONGIA. 163 



fan-shaped, more or less lobed, and covered with 

 lall irregular en 

 Southern seas. 



small irregular crevices. 



LATTICED. 



52. Spongia cancellaria. Pediculated, compressed, 

 and fan-shaped ; ramifications incrusted, coalescent, 

 and forming a sort of irregular trellis-work ; border 

 stuck with points. 



LYRE-SHAPED. 



53. Spongia lyrata, Pediculated, upright, and 

 composed of tubes united together ; texture fibrous 

 and reticulated ; upper border osculated. 



DELTA-SHAPED. 



54. Spongia deltdidea. Pediculated, upright, 

 flat, and rather thin ; incrusted, delta or fan- shaped, 

 and truncated ; small Alcyonic worms incrusted on 

 each surface. 



FRYING-PAN. 



55. Spongia sartaginula. Pedicle short ; expan- 

 sion in the form of a frying-pan ; surface convex and 

 much osculated, and garnished with oblique tufts, in 

 undulated series; texture fibrous, finely reticulated 

 and incrusted. 



TAILED. 



56. Spongia appendiculata. Nearly pediculated, 

 flattened and spatulated, with narrow lobes or appen- 

 dages varying in length, nearly cylindrical, digitated, 

 and obtuse. 



