348 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Male . — Unknown . 



Tijpe.—V.S.'NM. No. 88566. 



Hosts. — A single female was taken from a gill of a yellow jack, 

 Caranx bo.rtholomaei (Cuvier and Valenciennes). Another female 

 was collected from a gill of a common jack, Caranx hippos (Lin- 

 naeus). A mutilated specimen that appears to belong to this 

 species came from a gill of a rock hind, Epinephelus adscensionis 

 (Osbeck). 



Remarks. — This species differs from Caligus bonito Wilson 

 (1905) and C. isonyx Steenstrup and Lutken (1861) in the shape 

 and length of the genital segment, in the short spines at the tip of 

 the fourth leg, and in possessing a peculiar spinulose suckerlike 

 organ at the posterior angles of the carapace and a sucker with a 

 ring of spines on the third leg. 



CALIGUS GERMOI, new species 



Figure 69, d 



Female. — Carapace somewhat wider than long (1.7-1.5 mm.), 

 more than half the entire length ; rather truncate than rounded at 

 the posterior ends ; lateral margins finely striate. Genital segment 

 one-fourth wider than long, barrel shaped. Abdomen 2-segmented, 

 one-fifth wider than long. Caudal rami slightly wider than long, 

 armed with three long plumose and one short terminal setae and 

 one lateral plumose seta. 



On the basal segment of the first antenna are several small 

 setae lateral to the lunule; the second segment longer than the 

 first, which is terminated by six hooks and four setae. Second an- 

 tenna stout, with two strong spines near base of hook. First max- 

 illa with a spine on the middle of the median margin. Second 

 maxilla, slender, with two curved terminal setae. Maxilliped with 

 two setae near the base of the second segment; terminal claw 

 curved, with two stout setae. Furcula with base about as long as 

 the divergent branches, with a small spine at each of the anterior 

 angles and a stout median anterior spine. Between the bases of 

 the third leg a f urculalike support bears a large and a small spine 

 at each anterior lateral angle and two posterior arms that curve 

 laterally and have acute tips. 



First swimming leg uniramous; terminal segment bears three 

 spines and six setae. Second leg biramous; exopod with three 

 segments and its terminal segment lamellate, bearing two spines 

 and five setae. The third leg is flattened and its basal segment is 

 fringed with minute setae and bears a strong posterior hook; on 

 its median margin is a sucker with five stout spines about its mar- 

 gin; a 1-segmented, setose exopod and a 2-segmented endopod 



