' Cumacea: 2-1. Nannastacidae, 6. Cumella 181 



large, corneal lenses large and prominent: antenna 2, flagellum reaching end 

 of body; uropods a little longer than the telsonic segment, the peduncle more 

 than half the length of that segment. L. 1-85 mm. 



Gulf of Siam, depths from 2 to 19 m. 



5. C. clavicauda Calm. 1911 C. c., Caiman in: Tr. zool. Soc. Loudon. ?'. 18iv 

 p. 341, 344, 346 t. 32 f. 7—10. 



Pseudorostral lobes very short, seemingly not meeting in front of the 

 eyelobe, truncate except for a small tooth at the medial angle, front margin 

 short, nearly straight, antero-lateral corner rounded off. Carapace with dorsal 

 line faintly sinuous, without spines. Pleon segments 1 — 4 with lateral groove; 

 telsonic segment the longest, inflated, encreasing in width backwards, hind 

 margin broadly convex, scarcely extended between the uropods. Eye very 

 large with 9 corneal lenses, one antero-median, pigment forming 2 small 

 lateral spots, suggestive of paired eyes as in Nannastams (p. 168). Antenna 

 1 nearly as in 6. forficnia (nr. 4) but shorter and stouter. Antenna 2, length 

 of flagellum agreeing with lateral grooving of the pleon. Peraeopod 5, S**^ joint 

 little more than half the second and about once and a half as long as the 

 4^^ joint. Uropods similar to those of C. forfiada, but rami less curved, 

 pedimcle about two-thirds as long as the telsonic segment. L. d 1-9 mm. 



unknown. 



Cruz Bay. St. Jan, Danish West Indies. 



6. C. leptopus Calm. 1911 C. l, Caiman in: Tr. zool. Soc. London, r. ISiv 

 p. 341, 344, 347 t. 32 f. 11—14. 



Pseudorostral lobes not produced to meet in front of the eyelobe, front 

 margin concave, antero-lateral corner slightly prominent, rounded. Carapace 

 with dorsal line very slightly sinuous, without spines. Pleon segments 1—5 

 with lateral grooves, telsonic segment less than two-thirds as long as the 5*'S 

 acutely extended between the uropods. Eye very large, 7 corneal lenses 

 large "and prominent, one antero-median, no conspicuous pigment. Antenna 



1 rather slender, 1-jointed accessory flagellum minute. Peraeopod 2, h^^ joint 

 more than twice as long as 4*^. Peraeopods 3—5 very slender; in 5*11 p^ir 

 the 5*11 joint about three-fourths as long as the ^l''^ and 4 times as long as 

 the 4*'!. Uropods long and slender, peduncle more than twice as long as 

 the telsonic segment, endopod less than half the peduncle apart from its 

 long apical spine ; exopod about flve-sixths of endopod, but with a still longer 

 apical spine. L. d 2*2 mm, 9 unknown. 



Cruz Bay, St. Jan, Danish West Indies. 



7. C. hispida Calm. 1911 C.h., Caiman in: Tr. zool. Soc. London, v.\%\\ 

 p. 341, 344, 347 t. 32 f. 15— 18. 



Scattered hairs on surface rather numerous. Pseudorostral lobes long, 

 obliquely upturned, acute, meeting in .front of the prominent eyelobe; front 

 margin concave, antero-lateral corner quadrate. Carapace with slightly undu- 

 lating dorsal line, a tooth behind the eye. and another before the middle. 

 Pleon a little shorter than preceding part of the body, telsonic segment nearly 

 as long as the S^^^ not inflated, obtusely extended between the uropods. Eye 

 pigmented. Antenna 1 rather slender. 1-jointed accessory flagellum minute. 

 Peraeopods 3—5 slender, S^^^ pair with 3^^ joint four-fifths as long as 2"'^, 

 thrice the i^^ and twice the ^^^ joint. Peduncle of uropods about three- 

 quarters as long as the telsonic segment, a little shorter than the straight 



