PLATE XLV. 



Fid. 



1. HALECIUM TENELLUM, p, 226, nat. size. 



1 a, 1 b. Portions, magnified. 1 c. The gouotheca. 



2, 2'. OPHIODES MIRABILIS, p. 231, magnified. 



2. One of the snake-like appendages. 2b. A portion of 

 the intertentacular web, with clusters of thread- 

 cells between the arms. 2 c, A calycle, magnified, 

 showing the diaphragm on which the poly pite rests. 

 2 d. The gonotheca. 



