no. 1404. pa RASITIC COPE PODS— CA LIGIBM— WILSON. 645 



legs. These are conical and three-jointed, with a seta at the end of the 

 first and second joints. 



The abdomen is rudimentary, only one-eighth the length of the genital 

 segment, and looking like a knob on its posterior border. 



Anal laminae proportionally large, longer than the abdomen, as wide 

 as long, with stout seta 1 three or four times the length of the lamina?. 

 Fgg strings not present. 



» Joints of the first antennae of about the same length and slender; 

 second antenna? of medium size and the usual shape. 



First maxilla? small and placed close to the second antenna?, the base 

 swollen more than usual, so that the} 7 appear two-jointed. 



Proboscis small and plump, of the same length and width, and 

 squarely rounded at the end. Second maxilla? the same length as the 

 proboscis, tolerably stout; the branches pointed and weakly curved. 

 Eyes small and circular. 



First maxillipeds of the usual form; second pair not as large as 

 usual, and lacking the accessor} 7 spine on the terminal claw. 



Furca small, the base squarely truncate, almost rectangular; the 

 foramen tolerably large and of about the same length and width. 

 Branches not as long as the base, simple, divergent, and pointed, the 

 sinus between them triangular, with the sides almost meeting ante- 

 riorly. Rami of the third legs close together, but pointing straight 

 backward. Fourth legs elongate, four-jointed, the basal joint as long 

 as the three terminal ones. 



There are five spines, of wnich those on the second and third joints 

 are equal and of medium size, while of the three terminal spines the 

 middle one is more than twice the length of the other two. 



Total length 3.35 mm. Length of carapace 2.1 mm.; width of same 

 1.8 mm.; length of genital segment 1.1 mm.; length of abdomen 

 t».12.") mm. 



Color not given. 



(cossyphi, the generic name of its host.) 



Kroyer bases this new species upon a single female taken from the 

 gills of the Spanish ladytish or hogfish, Ilarpe rufa, in the West 

 Indies. But although thus confined to a single specimen, the species 

 presents well-defined characters which serve to distinguish it from all 

 others. 



The first of these characters is the relative proportion of the various 

 body regions. The carapace and genital segment are noticeably large, 

 while the free segment and the abdomen are equally small. The gen- 

 ital segment is also of a peculiar shape, and the fifth legs are unusually 

 prominent. 



But the crowning mark of distinction, if we may believe Kroyer's 

 statement, is the fact that these fifth legs are indistinctly three-jointed. 

 In no other known species of Oaligus or Lepeophthevnts is there any 



