ZOOLOGY. 



sponges north of New York is CJialinula oculata (Bower- 

 bank), which grows in long slender branches on the piles or 

 wharves and bridges. Allied to it is Axinella (Fig. 32, A. 

 polypoides). 



Allied to Tethea, which is sessile, is a deep-sea form grow- 

 ing on a long stalk, i.e., Stylocordyla boreale (Fig- 33)- At 

 the depth of 100 fathoms in the Gulf of Maine occurs a 



7 

 \ 



Fig. m.P/ifi-oiifina Amur, half natural size, with stellate and anchor-like spiculos, 

 much enlarged. After Leidy. 



similar species ($. lonyisxhuwn Sars). Fig. 34 represents 

 a fine silicious sponge (Pheronema A mice Leidy) from the 

 West Indies. The most beautiful of all silicious sponges is; 

 the Venus' flower-basket (E it pled ell urn aspergilhtm), which, 

 lives anchored in the mud at the depth of about 10 fathoms,, 

 near the Philippine Islands. 



