SEA-FISHEEIES LABORATORY. 



115 



The two views are those seen by focussing through the 

 same piece of a proboscis. 



(fl) There are two prominent and characteristic 

 spines in each oblique row, [2), which are long and 

 slender, and only slightly curved, and which generally 

 lie across each other. At tlie base of each of these spines 

 is a much smaller one with a wide slipper-shaped base, 

 and a sharply bent apical portion. 



/ 2. S 



Fig. 3. Tetrarhynchus benedeiii (Cretj). 



1. The Scolex and anterior part of " neck " region. 



2. Part of a proboscis. 



3. The same part — the obverse view. 



4. A botluidium seen en face. 



5. The terminal proglottis. 



[h) Opposite to these, on the otlier side of the 

 proboscis, is a group of three spines. Une of these {3) is 

 rather large, with expanded basal part, and sharply 

 curved apex. From underneath it there projects a 



