SPONGES 71) 
COLOR OF FLESHY SPONGES. 
There is one species of sponge of this group which occurs in abundance on 
stones in Nassau Harbor, which appears to vary in color from white to black. 
depending upon the situation in which it grows: the light edlered ones occur- 
‘ying in situations which are sheltered-from the direct rays of the sun. = This 
is the species given in Fig. 41. 
Another species which grows in Nassav Harbor is dull orange or brownish 
in color. Others are bright yellow. while afew are bright red. 
GEOGRAPHICAL RANGE OF FLESHY SPONGES. 
Sponges of this group are, | believe, confined to tropical or sub-tropical 
waters, and grow mostly in comparatively shallow water, but neycr, as far as | 
have seen, where they are exposed to the falling tide. - 
