LAOPHONTR. ral 
The fifth pair has a very large basal joint, the mternal 
seement 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 (Joc. cit.) 
Laophonte is, I think, undoubtedly identical generi- 
cally with those assigned by Claus 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, Claus, Pl. LX XII, figs. 1—14. 
Cleta serrata, Claus. Die frei-lebenden Copepoden, p. 123, t. xv, 
figs. 13—20 (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 
