Cumacea: 24. Nannastacidae, 4. Platycuraa, 5. Cumellopsis 



177 



forward as the antero-lateral corners, truncate in dorsal view, antero-lateral 

 margin concave between 2 convexities. Carapace large, depressed, quadrate 

 in front, slightly widened to the convex hinder part of the carinate sides, 

 hind margin trilobed, the middle lobe concealing the first 2 and partially 



the 3^ of the pedigerous segments. Of these the 

 4*i» and 5*^^ and of the pleon the first 5 segments 

 have each a pair of thin serrate dorsal crests. Pleon 

 less than half the length of the body, the segments 

 without lateral grooves; telsonic segment distally 

 wider than its length, scarcely produced between 

 the uropods. Eyelobe obsolete. Antenna 1, 1^* 

 joint equal to 2^*^ and 3'^ combined, flagellum 

 3- jointed, shorter than 3^ joint of peduncle, 2- 

 jointed accessory minute. Antenna 2, with sensory 

 hairs very numerous, flagellum not reaching the 

 pleon. Mandibles with about 9 spines in the spine- 

 row, molar stout. Maxilliped 1, the S^ joint sup- 

 pressed. Maxillipeds 2, 3, 3*^ joint distinct, but 

 small. Peraeopod 1, &^^ joint subequal to 5*^ 

 nearly thrice as long as 7*'^ Peraeopod 2, 7^^ 



Fig. 121. 

 P. holti ((J; Caiman. 



Fig. 122. 

 P. holti Caiman, coiled intestine. 



joint'ilonger than 5*1^ and over thrice as long as 6'i'. In the 3^ to 5*1^ pairs 

 the 5*^ joint more than twice as long as the Q^^\ the 7*^^ very small but 

 carrying a long curved spine or claw. Uropods three-fourths as long as the 

 pleon, endopod about two-thirds as long as the peduncle, and exopod in the 

 same relation to the endopod. L. 4-1 mm. 



W. coast of Ireland, 77 miles W. N. W. of Achill Head, county Mayo, depth 699 m, 



5. Gen. Cumellopsis Caiman 



190b Cumellopsis (Sp. un.: C.helgae), Caiman in: Sci. Invest. Fish. Ireland, 1904 

 app. 1 p. 3, 28 I 1906 C. Caiman in: iMt. Stat. Neapel, «. 17iv p. 418. 



Carapace subovoid, more or less overhanging anterior pedigerous 

 segments, antero-lateral corners well pronounced. Eyelobe small, without 

 eye. First maxilla with two filaments to the palp. Branchial leaflets faii'ly 

 developed. 



2 species. 



Synopsis of species: 

 I Peduncle of uropods nearly twice as long as the endopod 1. C. helgae 

 \ Peduncle of uropods not nearly twice as long as the endopod 2. C. puritan! 

 Das Tierreich. 39. Lief. : T. R. R. Stebbing, Cumacea. 12 



