Cyphocaris 29 



■witli joints 2 and 3 subequal. Maxiila 1, inner plate witli 7 setae, outer plate 

 with 11 spines, palp witb 6 spiue-teeth. Maxilla 2, inner plate broader than 

 outer. nearly as long, with setae on inner margiu. Maxillipeds, inner plates not 

 very long, witli 3 apical spine-teeth, outer plates not large, fringed with spine- 

 teeth, palp elongate. Gnathopod 1. feebly subchelate, 2*^ Joint longer than rest 

 of lirab. Gnathopod 2 elongate. Peraeopods 3 — 5, 2^ Joint deeply serrate 

 on bind margin. Uropod 3, rami subequal, long, laneeolate. Telson long, 

 tapering. deeply cleft. 



2 species. 



Synopsis of species: 



Peraeopod 3, 2*1 Joint produced into a long spur 1. C. ehallengeri . ]>. 29 



Peraeopod 3, 2^ Joint not produced into a long spur ... 2. C. anonyx . . . p. 29 



1. C. ehallengeri Stebb. 1888 C. c, T. Stebbing in: Rep. \'oy. ('ha II enger, 

 u. 29 p. fifjl t. 17 I 1893 C. c, A. Della Valle in: F. Fl. Neapel, r. 20 p. 847. 



Top of head facing forward, its proper front raargin a little sinuous. 

 Peraeon segnient 1 as long as 3'' and 4*ii corabined. Side-plate 4 conoealing 

 the 3*^, with long irregularly bowed front and deeply excavate bind margin, 

 5^"^ much broader than deep. Pleon segment 3, postero-lateral angles 

 squared, minutely produced. Antenna 1, P* Joint equal to 2*^ and 3*^^ combined, 

 flagellum with 15 joints, P* as long as l*** of peduncle, accessory flagellum 

 3-jointed. Antenna 2, ultimate Joint of peduncle shorter than penultimate, 

 flagellum 40-jointed. Gnathopod 1, 6**' Joint a little narrower and longer than 

 5*^ narrowing distally, liind raargin minutely pectinate, tinger denticulate and 

 toothed on inner margin. Gnathopod 2. 5**^ and H*'> joints longer than in 

 gnathopod 1. ö**^ shorter than ö'^', palm small, well defined, finger curved. 

 Peraeopods slender, except in 2"^ Joint of peraeopods 3—5. Peraeopod 3, 

 2*^ Joint, front margin strongly beut, hinder cut into 7 teeth and prolonged 

 sharply almost to end of H"^ Peraeopod 4, 2*^ Joint almost triangulär, 

 with 14 teeth. much overlapping 3'^ Joint. Peraeopod 5, 2*^ Joint more oval, 

 with 13 teeth, a little overlapping '^^ Joint, üropod 3, rami long, almost 

 equal. slightly arraed. Telson cleft for -''^ of the length, without lateral, 

 but with a pair of apical spinules. L. about 7 mm. 



North-Pacific (north of Sandwich Islands). 



2. C. anonyx lioeck 1871 Ca., (Lütken in JIS.) A. Koeck in: Forh. Selsk. 

 Christian., 1870 j). 104 | 1872 C. a., A. Boeck, Skand. Arkt. Amphip.. o. 1 p. 141 t. 6 

 f. 1 i 1887 C. a., H. J. Hansen in: Vid. Meddel., ser. 4 r. 9 p. ti7 j 1888 C. micronyx, 

 T. Stebbing in: Rej). \'oy. Challenger, i;. 29 p. *>.')6 t. 1(>. 



Head partly concealed in overarching, rather sharply projecting, long 

 1^* peraeon segment. Side-plate 4 more angular than in C. ehallengeri. 

 Pleon segment 3, postero-latei'al angles almost quadrate. Antenna 1, P* 

 Joint longer than 2^^ and 3*^ combined, flagellum with 21 — 30 joints, P*^ very 

 long, accessory flagellum 5-jointed. Antenna 2, ultimate Joint of peduncle shorter 

 than penultimate, flagellum 7 5-jointed. Gnathopod 1 nearly as in C. ehallengeri, 

 6*^ Joint not longer than 5*'\ Gnathopod 2, G*'^ Joint oval, shorter than 

 5**», both arraed on bind margin with graduated sets of pectinate spines 

 and long broad-ended setae, finger minute. Peraeopods 1 and 2 subchelate, 

 the 6^'^ Joint being distally wideued and having a palm margiu set with 

 teeth and spines, finger powerful, curved, acute. Peraeopod 3, 2*^ Joint with 

 front margin bent, bind margiu cut into about 8 teeth, prolonged to end 



