240 Poiitocrates 



outer plates scarcely reaohiDg beyond middle of large 2^ Joint of palp. 

 Guatliopods 1 and 2 very dissimilar. Guathopod 1, 5*^ Joint with short base 

 and long process, ö*'^ oval, palra well defined. Gnathopod 2, 5*^ Joint with 

 Short base and process produced beyond the chela which is formed between produced 

 end of naiTOW 6*^^ Joint and short finger (the process appears to be partially 

 coalesced with the 6*^ Joint, though less so than in Synchelidium (p. 241). 

 Peraeopods 1- — 4 rather stout, densely setose, finger minute. Peraeopod 3 

 very ahort. Peraeopod 5, 2*^ Joint broad oval, subequal in length to 4*^ 

 5th^ ßth QY 7^\ Uropod 3, rami narrow, longer than peduncle. Telson small. 



3 species. 



Synopsis of species: 



j Antenna 2 in ? much longer than antenna 1 . . . 1. P. altamarinus . [). 240 

 ) Antenna 2 in $ little longer than antenna 1 — 2. 

 Gnathopod 2, thumb of chela much broader than 

 finger, process of 5tli Joint little produced 



beyond 6th 2. P. arctieus ...]>. 240 



Gnathopod 2, thumb of chela scarcely broader 

 than finger, process of 5tli Joint much produced 

 beyond 6th 3. P. arenarius . . p. 241 



1. P. altamarinus (Bäte & Westw.) 1862 Kroyera altamarina, Bäte & Westwood, 

 Brit. sess. Crust., v. 1 p. 177 f. | 1893 Kröyera a., A. Della Valle in: F. Fl. Neapel, v. 20 

 p. 554 I 1895 Pontocrates altamarinus, G. 0. Sars, Crust. Norway, v. 1 p. 695 t. vn f. 2. 



Moderately robust. Rostrum a little projecting, moderately deflexed. 

 Side-plate 1 expauded and rounded distally, 2^ and 3'^ slightly uarrowed 

 distally, 4^*^ rather produced at lower bind corner. Eyes rather large, yellowisb 

 red. Antenna 1 much shorter than antenna 2 in both sexes, 2^ Joint fully 

 as long as P*, flagellum shorter than peduncle, 8-jointed. Antenna 2 in 9 , 

 ultimate Joint of peduncle longer than penultimate, flagellum longer than peduncle. 

 Gnathopod 1, process of 5*^ Joint not reaching much beyond bind margin 

 of 6*^, which is rather large, oval fusiform, palm obliquely curved, much longer 

 than bind margiu, densely fiinged with minute curved spinules. Gnathopod 2, 

 process of ö^ii Joint produced very little beyond chela, 6*^1 Joint slightly tapering, 

 thumb of chela little broader than finger, fringed as in palm of gnathopod 1. 

 Peraeopods 1 and 2 moderately robust, (i^^^joint narrower than 5*^, but subequal 

 in length. üropod 3, peduncle rather long, rami unarmed (Sars, but?). 

 Telson oval, apex a little insinuate. Colour semipellucid, dorsally marbled 

 with opaque light yellowish, anteunae banded with orange; ova in pouch 

 reddish brown. L. 9 nearly 7 mm. 



North-Atlantic and North-Sea (Skudesnes, depth 38 m; France; British Isles). 



2. P. arctieus O. Sars 1883 P. norvegicus (err., non Oediccrus n. A. Boeck 

 1861 !), J. S. Schneider in: Tromso Mus. Aarsh., v. 6 p. 17 t. 2 f. 15; t. 3 f. 21, 22 i 1889 

 P. n., Hoek in: Tijdschr. Nederl. dierk. Ver., ser. 2 p. 2 p. 193 t. 9 f. 8 | 1892 P. n., G. O. 

 Sars, Crust. Norway, v.l p. 315 t. 111 f. 2 | 1895 P. arctieus, G. O. Sars, Crust. Norway, 

 V. 1 p. 693. 



Rather stout, tumid in front. Rostrum short, much deflexed. Side- 

 plate 1 with lower margin flattened, slightly insinuate, 2'^ rather narrowed 

 distally, S^ not so, 4*^ rather produced at lower bind corner. Eyes rounded, light 

 red with whitish coating. Antenna 1 in 9 nearly as long as antenna 2, 2*^ Joint 

 shorter than P*, flagellum nearly as long as peduncle, 8- or 9-jointed. Antenna 2, 

 ultimate and penultimate joints of peduncle subequal, flagellum in 9 a little, in ö 



