184 CLASS III.— ORDER 1. 



CROSS-BARRED. 



151. Spo^jgia clathrus. A conglomerate tuft, nearly 

 globular, soft to the touch, composed of short branches 

 which are tortuous, anastomosed and osculated, with 

 obtuse and swelled summits. 



COALESCENT. 



152. Spongia coalita. Base an expanded mem- 

 brane, enveloping many bodies, and dividing itself 

 into proliferous branches, soft and pleasant to the 

 touch ; surface irregularly reticulated. 



Northern Ocean. 



PITTED. 



153. Spongia foveolaria. Branching, long, and 

 blackish ; branches anastomosing, nearly cylindrical, 

 and conical at the summit ; the outside covered with 

 small unequal pits having ragged borders. 



Mediterranean. 



LONG-FINGERED. 



154. Spongia macrodactyla. Branching and long; 

 branches nearly alternate, long, and partly com- 

 pressed, unequal, attenuated, upright in the lower 

 part, and curved in the upper. 



Indian Ocean. 



CLUSTERED. 



155. Spongia botry aides. Branching, diffuse, but 

 small ; branches charged with triple spines, and sup- 

 porting small oblong- oval lobes, hollow, and open 

 at the summits, finely porous, and in drapery. 



Coasts of England and France. 



