182 Curaacea: 24. Nannastacidae, 6. Cumella 



endopod including its indistinctly separated apical spine: exopod three-quarters 

 as long as endopod. L. g 2*55 mm. 6 unknown. 



Gulf of Siam, depth 9 m 



8. C. serrata Calm. 1911 C.s., Caiman in: Tr. zool. Soc. London, ul8iv p.341, 

 344, 348 t. 32 f. 19—24. 



y . Surface without conspicuous hairs. Pseudorostral lobes, long, 

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

 margin concave, antero-lateral corner with an acute tooth. Carapace com- 

 pressed, dorsal line slightly convex, with about 6 procurved teeth, the last 

 on a prominence at the back, separated from the rest by a shallow depression. 

 Pleon equal to preceding part of the body, telsonic segment shorter than 

 the 5*^^, not inflated, obtusely extended between the uropods. Eye with distinct 

 lenses, without pigment. Antenna 1, 3"^ joint a little shorter than 2^^^ Peraeo- 

 pod 1, 2"*^ joint little more than half as long as the following joints com- 

 bined. Peraeopods .3 — 5 rather slender, 5*^ pair with 5*^ joint nearly as 

 long as 2"*^, more than twice the 4*^^ and nearly twice the 6^^ joint. Peduncle 

 of uropods longer by a fourth than telsonic segment, and by a third than 

 the endopod without its apical spine; exopod less than two-thirds as long 

 as the endopod. L. 2*2 mm. 



(S. Pseudorostral lobes less produced than in 9 , obliquely truncate, 

 upper edge slightly concave, front margin receding, antero-lateral corner 

 rounded. Carapace with dorsal line nearly straight, without teeth. Pleon 

 shorter than preceding part of the body, segments 1 — 5 with lateral grooves. 

 Eye with a number of large and prominent lenses, but without pigment. 

 Antenna 2, flagellum as long as the body. Peduncle of uropods longer by 

 a half than the telsonic segment, the endopod less than two-thirds as long 

 as the peduncle. L. 2'3 mm. 



Cruz Bay, St. Jan, Danish West Indies. 



9. C. laevis Calm. 1911 C. I., Caiman in: Tr. zool. Soc. London, i'. 18iv p. 341, 

 344, 350 t. 32 f. 25—27. 



Surface without conspicuous hairs. Pseudorostral lobes short, truncate, 

 meeting in front of the prominent eyelobe, front margin receding, antero- 

 lateral corner rounded. Carapace with dorsal line horizontal, slightly sinuous, 

 without teeth. Pleon shorter than preceding part of body, telsonic segment 

 less than two-thirds as long as the 5*^ the broadly rounded end little ex- 

 tended. Eye pigmented. Antenna 1 rather stout, 3*^ joint shorter than 2""^, 

 the 1-jointed accessory flagellum minute. Peraeopod 1, 2'^'^ joint about half 

 as long as remaining joints combined. Peraeopods 3 — 5 short, stout, b^^ pair 

 with 5*^ joint little more than half as long as the 2^*^ and about one half 

 longer than the 4*^ and little longer than the 6*"^ joint. Peduncle of uro- 

 pods nearly twice as long as telsonic segment; endopod more than two-thirds 

 as long as the peduncle, and subequal to exopod, each with the terminal 

 spine distinct. L. Q 1*L5 mm. (5 unknown. 



Gulf of Siam, depth 2—15 m. 



10. C. pygmaea O. Sars 18fi5 C. p., G. O. Sars in: Eorh. Selsk. Christian., 

 1864 p. 199 I 1869 C. agilis (d), A. M. Norman in: Rep. Brit. Ass., r. 68 p. 272 | 

 1879 C. pygmaea, G. 0. Sars in: Arch. Naturv. Kristian., vA p. 94 t.50— 52 [ 1897 C.p., 

 T. Scott in: Rep. Fish. Board Scotl., «;. 15 p. 135 | 1897 C. p., Ehrenbaum in: Wiss. 

 Meeresunters., i;. 2i p. 419 | 1900 C.p., G. 0. Sars, Crust. Norway, v.'d p. 81 t. 55 ] 1900 

 C.p., Zimmer in: Fauna arctica, v. I p. 428, 438 | 1901 C.p., A. 0. Walker in: J. Linn. 



