224 Annals of the, South African Museum. 



The genus contains only 4 other species, viz. : /. brcviremus, G. 0. 

 Sars, 1897, from Norway, I. calif ornica, Kichardson, 1904, from Cali- 

 fornia, J. kincaidi, Kichardson 1904, from Alaska, and /. longian- 

 tennata, Thielemann 1910, from Japan. 



GEN. JAEEOPSIS, Koehler. 



1885. Jaeropsis, Koehler, Ann. Sci. Nat. ser. 6, vol. 19, art. 1, p. 2. 



1886. Beddard, Challenger Eep. vol. 17, p. 20. 

 1893. Stebbing, Hist. Crust, p. 379. 



1905. ,, id. in Herdman's Ceylon Pearl Fish. Suppl. Eep. 23, 



p. 50. 

 1909. Eichardson, Proc. U.S. Nat. Mus. vol. 36, p. 421. 



JAEKOPSIS CURVICOBNIS, (Nicolet). 

 (Plate XX. C.) 



1849. Jaera curvicornis, Nicolet, in Gay's Hist, de Chile. Zool. vol. 3 



p. 263. pi. 3, fig. 10. 



1891. Jaeropsis neo-zelanica, Chilton, Tr. N.Z. Inst. vol. 24, p. 267. 

 1902. ,, cnrv/cornis, Eichardson, Tr. Conn. Acad. Sci. vol. ii. 



p. 298. 

 1905. Stebbing, I.e. p. 51, pi. xi. (C). 



The single specimen differs only in details from the descriptions 

 of Chilton and Stebbing ; both the latter, like Nicolet's, were based 

 on females, whereas this specimen is a male. 



The head is broader than long, the antero-lateral angles not so 

 produced as in Stebbing's figure ; the eyes are dark. 



Second antenna, 5th joint not denticulate on inner (front) margin 

 as in Stebbing's figure. 



Mandibles, the spine-row has 10 spines. 



The apex of the pleon between bases of the uropods is convex ; in 

 Stebbing's figure it is emarginate. The lateral margins have 3 teeth 

 on one side, 4 on the other. 



First pleopods very little expanded distally, with rami. 



Second pleopods, peduncle lanceolate, exopod arising some distance 

 from apex, male stylet hardly projecting beyond its apex. 



Third pleopods, inner ramus with 3 apical strong plumose setae, 

 outer ramus very little longer than inner, 2-jointed, 2nd joint apically 

 pointed. 



Fourth pleopods, outer ramus minute. 



