G. SPONGIA. 181 



Var. B. Branches upright, rather compressed, and 

 incrusted. 

 Australasia. 



OCULATE. 



136. Spongia oculata. Branching, upright, tough, 

 and cylindrical ; branches obtuse ; oscules small, and 

 almost double. 



European Ocean. 



SAUSAGE-SHAPED. 



137. Spongia botellifera. Stem short and narrow, 

 dividing into upright branches, irregularly tubercled, 

 jagged, blistered, and resembling small ill-shapen 

 sausages ; surface osculated. 



South seas. 



PALMATED. 



138. Spongia palmata. Stem short, thick, com- 

 pressed, and incrusted ; ramifications palmated, flat, 

 with bare and wide digitations, which are lobed, 

 forked, and sometimes three-forked at their summits ; 

 scattered oscules. 



Var. B. Branches longer, and dilated towards the 

 summit, with the extremities forked and pointed. 



The first, in the seas of Europe and India ; the 

 second, in the seas of Australasia. 



WOOLLY. 



139. Spongia lanuginosa. Branching, dichotomous, 

 rather compressed at the ramifications ; branches cy- 

 lindrical, slender, and upright ; fibres bare, very fine, 

 interlaced," and woolly. 



TYFHINE. 



140. Spongia typhyna. Branching and soft ; 



