176 
CLASS III. —ORDER L 
LEAFY. 
114. Spongia frondifera. Somewhat branching, di~ 
vided in unequal lobes, which are proliferous ; the last 
of the lobes being the largest, less irregular, more fo- 
liaceous, incrusted, compressed, and as if bearded or 
fringed on the upper border ; oscules scattered, and 
nearly star-formed. 
Yar. B. Less shapely, with a more compact crust. 
FRINGED. 
115. Sfongia jimbriata. Lobes leaf-formed, pedi- 
culated, broad, a little incrusted, covered with unequal 
pores like punctures ; borders garnished with crisped 
or curled fibres. 
SECTION VI. 
Masses branching , plant or tree-formed ; ramifications 
distinct. 
ARBORESCENT. 
116. Spongia arborescens. Stem firm and almost 
cylindrical ; branches standing out, a little compressed, 
but widening, palm ate d or digitated at the summit ; 
oscules scattered, and sometimes pretty regular. 
Var. B. Lobes longer and upright. 
Var. C. Lobes long, compressed, narrow, straight, 
and approximate ; borders osculated. 
American seas. 
