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CLASS III. — ORDER I. 
SECTION I. 
Masses sessile , simple or lobed, either covering or 
enveloping, 
COMMON. 
1. S pon 61 A communis. Masses rather large, 
spreading, and slightly convex upon the top, soft, 
tough, and coarsely porous ; scooped out and jagged 
particularly below, exhibiting round holes, mostly 
very large. 
Red Sea, Indian Ocean, and perhaps in the Medi- 
terranean. 
JAGGED. 
2. SpoNGtA lacinulosa. Surface rather finely po- 
rous, and stuck with numerous little jags or risings, 
which are soft, and make it appear downy; lobed 
above, or pierced with holes of a middling size, having 
their borders ciliated with those little spongy jags, 
called lacinules , from whence it derives its name. 
Found in the Red Sea and Indian Ocean, and is 
not unfrequently used as a substitute for the common 
sponge ( S. communis ) for domestic purposes. 
SINUOUS. 
3. Spongia sinuosa. Oval and sessile; texture 
fibrous, stiff, and partially incrustated ; surface covered 
with numerous and deep holes, crevices, and sinuo- 
sities. 
Indian Ocean. 
