180 CLASS III.— ORDER I. 



drical; branches short and few, forming sometimes 

 only a simple tuberosity^ situated in the upper part ; 

 texture fibrous, reticulated, bare, and osculated. 

 Southern seas. . 



SELAGO. 



132. Spo^iGiA selaginea. Very branching ; branches 

 diffuse, stiff, incrusted, rough to the touch, com- 

 pressed, attaching to soft bodies, and charged with 

 small longitudinal tufts, which are somewhat thorny, 

 and numerous. 



KOUGH-HORNED. 



133. Spongia aspericornis. Branching, and slightly 

 porous ; branches loose, numerous, nearly cylindrical, 

 lengthened in the form of horns, and stuck with 

 pointed tubercles, which are stiff and prickly ; fibres 

 slightly incrusted. 



Var. B. Branches large and compressed. 

 Australasian seas. 



RUGGED. 



134. Spongia hispida. Soft, branching, and irre- 

 gular ; branches cylindrical, proliferous, coalescing 

 at intervals, obtuse, and osculated ; fibres very fine, 

 interlaced, and almost bare. 



Southern seas. 



SERPENTINE. 



135. Spongia serpentina. Very branching; branches 

 cylindrical, irregular, mis-shapen, soft, and diftuse ; 

 texture very fine, fibrous, and scarcely incrusted; os- 

 cules scattered and distant. 



