LAOPHONTE. 71 



The fifth pair has a very large basal joint, the internal 

 segment of which (and sometimes also the outer) is 

 usually much produced ; second joint smaller and 

 ovate. In the male the fifth pair is much smaller than 

 in the female. 



This genus in anatomical structure, though not in 

 general appearance, very closely resembles Mesochra, 

 Boeck, but differs in the poorly developed mandible- 

 palp, and the strongly clawed inner branch of the first 

 pair of feet. The serrated or denticulated posterior 

 margin of the body-segments and the rigid, angular 

 build of the animal likewise furnish good distinctive 

 characters. The species called by Philippi (loc. cit.) 

 Laophonte is, I think, undoubtedly identical generi- 

 cally with those assigned by Glaus to the genus Cleta, 

 and of course has the claim of priority as to nomen- 

 clature. Asellopsis hispidus (loc. cit.), though very 

 abnormal in general appearance, seems to have no 

 special point of structure calling for generic separa- 

 tion. 



1. LAOPHONTE SERRATA, Glaus, PI. LXXIII, figs. 1 14. 



Cleta serrata, Glaus. Die frei-lebenden Copepoden, p. 123, t. xv, 

 figs. 1320 (1863). 



Body elongated ; the first segment almost square 

 when viewed laterally, produced into a rostrum of 

 moderate size, and about equal in length to the three 

 following segments ; each segment considerably over- 

 laps the next one, forming a prominent dorsal angle ; 

 the fifth and sixth segments are constricted and the 



