G. SPONGIA. 
167 
BASKET-SHAPED. 
71. Spongia sportella. Formed by an union of 
ligneous nerves, whitish or yellow, bare and smooth, 
having the appearance of an open funnel-shaped 
basket. 
Coast of Madagascar. 
PURSE-FORMED. 
72. Spongia bursaria. Mass fan-shaped, more or 
less flattened, formed by three or five tubes or 
purses, which are spongy, cuneiform, flattened, and 
united by their narrow sides. 
TWO-LEAVED. 
73. Spongia bilamellata. A short pedicle, rather 
funnel-shaped, terminated by two large thin upright 
expansions, which are parallel, approximate, and 
fan-shaped. 
Var. B. Expansions nearly smooth externally. 
Southern Ocean. 
CUP-FORMED. 
74. Spongia calix. Pediculated, upright, and re- 
sembling a calix ; the internal cavity contracted by 
gibbous irregularities. 
Southern Ocean. 
FIG-SHAPED. 
75. Spongia ficiformis . Stiff and turbinated; the 
summit pierced. 
Coasts of Barbary. 
