Cheirimedon, Tryphosella 67 



Head, lateral corners angularly projecting. Body compressed; side-plates 

 deep, 4:^^ deeply not broadly excavate. Plcon segment 4 with high compressed 

 projectiou. Antenna 1, 2*^ and 3*^ joints short, 1^* of flagellum long. Epistome 

 slightly projecting, defined by short incision from upper lip. Mandible with 

 denticulate molar, palp elongate, attached above the molar, its 1^* Joint 

 Short. Maxilla 1, inner plate with 2 plumose setae, outer wit^h 11 spines, 

 palp with many apical spine-teeth. Maxilla 2, plates fringed at the apices. 

 Maxillipeds, plates of moderate size, 2^ Joint of palp not longer than 1^*. 

 Gnathopod 1 siibchelate, 5^^ Joint very short, triangulär, 6*^ large, expanding 

 gradually to the transverse palm, 7*^ Joint as long as breadth of palm. 

 Gnathopod 2 subchelate. Peraeopods 1 and 2, 4*^^ Joint rather long. Peraeo- 

 pods 3 — 5, 2*^ Joint longer than broad. Branchial vesicles simple, üropod 3, 

 peduncle not very long, outer ramus 2-jointed, much longer than the inner. 

 Telson narrowing distally, deeply cleft. 



2 species. 



Synopsis of species: 



Pleon segment 3, postero-lateral angles uncinate . . 1. C. crenatipalmatus . . p. 67 

 Pleon segment 3, postero-lateral angles quadrate . . 2. C. latimanus p. 67 



1. C, crenatipalmatus Stebb. 1888 C. c, T. Stebbing in: Rep. Voy. Challenger, 

 t\29 p.638 t. 12 I 1893 C. c, A. Della Valle in: Y. Fl. Xeapel, u 20 p. 837. 



Head, lateral lobes sharply produced. Pleon segment 3, postero-lateral 

 angles acutely and sti'ougiy upturned. Antenna 1, flagellum with 12 joints, of 

 which 1^* very long, longer than 3-jointed accessory flagellum; antenna 2, ulti- 

 mate and penultimate joints of peduncle subequal, flagellum 7-jointed. Maxilla 1, 

 palp with 9 teeth on right, 12 on left maxilla. Gnathopod 1, palm margin 

 crenulate. Gnathopod 2, 3*^ Joint shorter than 5*^ which is rather robust, 

 ö*'^ scarcely half length of ö**^, palm not at all produced, finger shutting 

 closely upon it. Telson nearly once and a half as long as broad. L. 9 7-5 mm. 



Cumberland Bay [Kerguelen Island]. Depth 230 m. 



2. C. latimanus (O. Sars) 1882 Normania latimana, G. O. Sars in: Forh. 

 Selsk. Christian., nr. 18 p. 83 t. 3 f. 6, 6 a | 1890 Cheirimedon latimanus, G. O. Sars, 

 Crust. Xorway, v.l p. 35 t. 13 f. 2 | 1893 C. l, A. Della Valle in: F. Fl. Neapel, i;.20 

 p. 838 t. 60 f. 50. 



Head, with lateral lobes produced almost acutely. Pleon segment 3, 

 postero-lateral angles quadrate. Eyes narrow oval. Antenna 1, flagellum with 

 7 joints, of which the 1^* moderately long, about half as long as the slender 

 3-jointed accessory flagellum; antenna 2, ultimate Joint of peduncle much shorter 

 than penultimate, flagellum 6-jointed. Gnathopod 1, 6*'^ Joint with palm 

 margin not crenulate. Gnathopod 2, 6*^ Joint fully half length of 5*^ Telson 

 almost twice as long as broad. L. 9 6 mm. 



North-Sea (ßukken [West-Norway]). 



41. Gen. Tryphosella Bonnier 



1890 Orchomenella? (part.), G. O. Sars, Crust. Xorway, v.l p.66 ] 1893 Tryphosella 

 (part.), J. Bonnier in: Bull. sei. France Belgique, u 24 p. 170. 



Antenna 2 in o little longer than antenna 1. Mandible with denticulate 

 molar, which is prominent, pointing backward, palp with 1^* Joint short, 



