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. Spongia 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. 
ROUGH-HORNED. 
133. Spongia aspericomis. 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 setpentina. Very branching; branches 
cylindrical, irregular, mis-shapen, soft, and diffuse ; 
texture very fine, fibrous, and scarcely incrusted; os- 
cules scattered and distant. 
