Argissa 277 



of palp distally widened. Maxilla 2, inner plate with lateral armature. 

 Maxillipeds, plates moderate, oiiter with apical spines, inner margin simple, 

 4*'' Joint of palp spiniform. Gnathopods similar, not subchelate, 6**^ Joint 

 slender, much «horter and narrower than ö***, finger slender, feeble. Peraeo- 

 pods 1 and 2 very sraall. Peraeopods 3 and 4, 2^ Joint moderately expanded, 

 smaller in 4*^^ pair than in 3"^. Peraeopod 5, 2<* Joint large, descending 

 much below 3*^, 4**^ and 5*^^ joints laminar, setose; all peraeopods with 6*^' 

 and 7*^^' joints small. üropod 3, rami foliaceous, inner margin setose. Telsou 

 large, tapering, deeply cleft. 



2 species. 



Synopsis of species: 



Eyes present 1. A. hamatipes . p. 277 



Eyes wanting 2. A. stebbingi . p. 277 



1. A. hamatipes (Norm.) 1869 Syrrho'eh., A.M.Norman in: Rep. Brit. Ass., 

 Meet. 38 p. 279 | 1893 Argissa h., T. Scott in: Rep. Fish. Board Scotl., v. II p. 213 t. 5 

 f. 30, 31 I 1871 A. typica, A. Boeck in: Korh. Selsk. Christian., 1870 p. 12.5 | 1872 & 7« 

 A. t, A. Boeck, Skand. Arkt. Amphip., v.l t. 7 f. 2; u 2 p. 206 | 1891 A. t., G. O. Sars, 

 Crust. Norway, v.l p. 141 t. 48 j 1893 A. t, A. DellaValle in: F. FI. Neapel, r20 

 p. 687 t. 59 f. 91 I 1890 Chimaeropsis danica, Meinert in : üdb. Hauchs, v. 3 p. 167 t. 2 

 f. 42—47. 



Head longer than peraeon segments 1 and 2. Side-plate 1 distally 

 widened and rounded, 2^ and 3*^ triangulär, 4*^ large, especially in o , 5*** 

 and 6*^ with hind lobe, much deeper than front. Pleon segments 4 and 5 

 dorsally smooth in 9 (Fig. 70), in ö dorsally produced, in segment 5 the 

 expansion large, overarching segment 6. Eyes, each containing 4 small 

 bigemiuous lenticular bodies imbedded at the periphery of a common pigmentary 

 mass (Sars). Antenna 1, P* Joint of peduncle as long as 2^ and 3^^ combiued, 

 flagellum with 7 joints, in Q as long as peduncle, in d much longer, in d 

 the tirst 2 joints of flagellum fused and fringed with cilia. Antenna 2, 

 ultimate Joint of peduncle as long as antepenultimate, much shorter than 

 penultimate, flagellum with 7 joints, in 9 subequal to last 2 joints of peduncle, 

 in d to the whole peduncle. Gnathopods setose. Peraeopods 1 — 5. finger 

 held at an angle to preceding Joint. Peraeopods 3 — 5 with 2'^ Joint glandulär, 

 üropod 3, outer ramus with minute 2* Joint. Telson in 9 subkiangular, 

 in ö more regularly oval. Colour whitish, pellucid, orange-tinted on antennae 

 and legs. L. 9 5, d 6 mm. 



Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Greenland; Norway, 

 depth 38— 188 m; Shetland; Firths of Forth and Clyde; S.W. of Belle Ile eu Mer, 

 depth 100 m); Kattegat. 



2. A. stebbingi Bounier 1896 A. s., J. Bonnier iü*: Ann. Univ. Lyon. v. 26 

 p.626 t.36 f. 4. 



Pleon segment 5 in d prolonged over 6*^ in a salient apically rounded 

 lamella. Head, lateral corners a little produced, obtuse; a vertical crest 

 separates bases of antennae 1 and 2 of one side from antennae 1 and 2 of 

 the other, the crest being divided by 2 emarginations into a bluntish rostrum, 

 a truncate prominence, and a subacute projecting epistome reachiug halfway 

 along antepenultimate Joint of peduncle of antenna 2. Pleon segment 3, postero- 

 lateral corners quadrate. Eyes wanting. Antenna 1 in d, 3*^ Joint fully half as 

 long as 2^. flagellum with 5 joints, together rather longer than peduncle. 1^* densely 

 clothed, longer than 2"^ and 3'^ joints of peduncle combined, accessory flagellum 



