674 Ericthonius, Cerapopsis 



Apparently very iiear to E. hunteri (p. 673), but iu gnathopod 2 in c? 

 the tooth of 5*^ Joint reaches nearly the extreraity of the 6^^^ and the bind 

 margin of the 6**^ Joint is crenulate or furnished with several tuberculiform 

 projections, as described by Stimpson in E. brasiliensis (p. 671). Telson small, 

 tubulär, armed at the apex with a number of small spines. Colour whitish, 

 variegated with brown. L. about 7 mm. 



Arctic Ocean (North-West of Finmark, depth 1217 m; South of Jan Mayen, depth 

 179 m). 



E. fasciatus (Stimps.) 1853 Cerapus f., Stimpson in : Smithson. Contr., v. 6 

 nr. 5 p. 49 t. 3 f. 35 | 1893 JErichthoiiius difformis (part.)?, A. Della Valle in: F. Fl. 

 Neapel, v. 20 p. 387. 



L. nearly 8 mm. 



Hake Bay [Grand Manan]. Depth 66 m, on a gravelly bottom. 



E. peculans (Dana) 1852 Amphitoe p., J. D. Dana in: P. Amer. Ac, v.2 

 p. 213 j 1853 & 1855 Dercothoe speculans, J. D. Dana in: ü. S. expl. Exp., v. 13ii p. 971; 

 t. 67 f. la— h I 1862 D. s., Cerapus s., Bäte, Cat. Amphip. Brit. Mus., p. 260 t. 44 f. 8 ] 

 1893 Erichthonius difformis (part.), A. Della Valle in: F. Fl. Neapel, u20 p.381. 



Perhaps the ? of E. pugnax or E. macrodactylus (p. 672.) 



Sooloo Sea. Depth 12 m. 



E. sp., Dana 1853 & 55 Dercothoe emissitius (part.)? (err., non Gammarns e. 

 J. D. Dana 1852 !>, J. D. Dana in: U. S. expl. Exp., v. 13ii p. 970; t. 66 f. 10a— e. 



Sooloo Sea. 



7. Gen. Cerapopsis Della Valle 



1893 Cerapopsis (Sp. un. : C. longipes), A. DellaValle in : F. Fl . Neapel, v. 20 p. 35«, 388. 



Side-plates 2 — 5 large. Antenna 1 without accessory flagellum. Antennae 1 

 and 2 with flagellum few-jointed. Mouth-parts as in P^ricthonius (p. 670), 

 except as follows. Mandibular palp has the 3"^ Joint rather long, apically rounded. 

 Maxiila 1 has the inner plate longer, tipped with 1 large and 1 small seta, 

 and outer plates of maxillipeds are more prolonged. Gnathopod 1 with palm 

 undefined. Gnathopod 2 becoming chelate in d , remaining subchelate, with palm 

 undefined, in Q . Gnathopods 1 and 2 much larger in ö than in Q . 

 Peraeopods 1 and 2, 2*^ Joint nan'ow. Peraeopods 3 and 4, 2^ Joint broad, 

 finger reverted. Peraeopod 5, 2^ Joint not very broad. üropods 1 and 2 

 bii-amous. Uropod 3, peduncle not expanded, ramus Single. Telson entire. 



1 species. 



1. C. longipes Della Valle 1893 C. l, A. Della Valle in: F. Fl. Neapel, r. 20 

 p. 388 t. 3 f. 10; t. 9 f. 20—40; t. 56 f. 1. 



Body compressed, rather robust. Side-plate 1, lower front, angle more 

 produced in ä than in Q , 2*^ covering 2* Joint of limb in Q but not in c?, 

 3* ti-apezoidal, 4*^ rectangular, 5*** with front lobe as deep as 4*'^. Antenna 1, 

 l^t Joint stout, % ^s long as 2*^, 3^^ as long as 1^*; flagellum less than 

 half as long as peduncle, with 3 rather long joints. Antenna 2 a little longer 

 than antenna 1, antepenultimate Joint of peduncle rather long, penultimate shorter 

 than ultimate, flagellum little longer than ultimate, 3-jointed. Gnathopod 1 

 in cJ, 2<^ Joint slender, 4*^ short, 5**^ more than 4 times as long as broad, 

 6*^ also narrow and a little shorter; finger slender, a little shorter than the 

 6**1 Joint. Gnathopod 2 in adult ö much stouter and rather longer; 2"^ Joint 



