278 Argissa, Astyra 



less than lialf its lengih, 2-joiiited. Anteuna 2 iu d twice as long, peimltimate 

 Joint ofpeduncle more thau thrice as loug- as antepenultimate, iiearly twice aslong 

 as ultimate, flagellum with 8 sleuder joiuts. Autenna l in 9 , 3"^ Joint less than 

 half 2'\ accessory flagellum as long as 1** Joint of primary. Ahtenua 2 in o , 

 penultiraate Joint of peduncle rauch shorter than in d. Mandibular palp pro- 

 portionally longer than in A. hamatipes (p. 277), 3'^ Joint twice as long as 2*^. 

 Maxiila 1, inner plate small, with 2 setae, outer with 7 spiues, 2*^ Joint of palp 

 niuch dilated towards the apex. Maxillipeds, finger ending in a long and strong 

 spine. Gnathopods 1 and 2, 6^^ Joint very narrowly oval, hind margin carryiug 

 serrate spines and some long setae, finger ending in a little spine. Feraeo- 

 pods 1 — 5 nearly as in A. hamatipes, but without glandulär bodies in 2'' Joint. 

 Uropods 1—3 and telsou also similar, but outer raraus of uropod 3 without 

 spiniform 2*^ Joint. L. ö nearly 5 mm, 9 a little sraaller. 



ßay of Biscay. Depth 940 ni. 



4. Gen. Astyra Boeck 



1871 Astyra (Sp. im.: A. abyssi), A. Boeck in: Forh. Selsk. Christian., 1870 p. 133 ^ 

 1876 A., A. Boeck, Skand. Arkt. Ampliip., v.2 p.442 j 1892 A., G. 0. Sars, Crust. ]\'orway, 

 r. 1 p.213 i 1893 A., A. DellaValle in: F. Fl. Neapel, -».20 p. 693. 



Body tumid in front, integument thin. Head little produced in front. 

 Side-plate 1 wider than 2^^ or 3*^, 4*** obliquely truncate below emarginatiou. 

 Anteuuae 1 and 2 rather strong, not elongate, 1^* with small accessory 

 flagellum, 2^ rather the longer. Mouth-parts projecting below. Upper lip 

 rounded. slightly emarginate. Lower lip (Fig. 71), inner lobes minute, 

 contiguous. between widely separated outer lobes. Mandible. cutting edge rather 

 Wide, transversely dentate, accessory plate on the left mandible, spines of spine- 

 row numerous, molar weak, conical, 2^ Joint of palp much longer than 3^^ 

 Maxilla 1, inner plate with several setae, 2^ Joint of palp long. Maxiila- 2, 

 both plates short, broad, densely setose. Maxillipeds, inner plates moderate, 

 outer large. reaching much beyond 2"^ Joint of palp, inner margin spinöse, 

 palp rather short, stout, finger small. Gnathopods 1 and 2 not robust, sub- 

 equal, scarcely subclielate, 5*^ Joint much wider than 6*^. Peraeopods 1 and 2 

 rather slender. Peraeopods 3 — 5 rather robust, 2^ Joint oblong, not widely 

 expanded. Uropods 1 — 3, rami narrowly lanceolate, spinulose, peduncle very 

 short and rami long in uropod 3. Telson small, deeply cleft. 



1 species. 



1. A. abyssi Boeck 1871 A. a., A. Boeck in: Forh. Selsk. Chi-istian., 1870 

 p. 133 I 1876 A. a., A. Boeck, Skand. Arkt. Amphip., v.2 p. 443 t. 9 f. 4 ! 1892 A. a., 

 G.G. Sars, Crust. Norway, v.\ p.214 t. 73 ' 1893 A. a., A. DellaValle in: F. Fl. Neapel, 

 (. 20 p. 694 t. 60 f. 2. 



Back quite smooth. Head, rostrum short. blunt, lateral augles almost obso- 

 lete, post-antennal lingniform, deflexed. Side-plate 1 distally expanded, 2*^ — 4*^ 

 distally narrowed, ö*** rounded quadrate, slightly bilobed. Pleon 

 Segment 3, post'ero-lateral corners nearly quadrate, segment 4 

 with deep dorsal depression. Eyes wanting. Autenna 1. 1^^ Joint 

 Fig. 71. A. abyssi. rather flatteued, as long as 2^ and 3'^ combined, flagellum 

 Lower lip. more than twice as long as peduncle, with 20 — 30 joints, 

 [After G. 0. Sars.] p,.Qj^jjjjj^j 5 — ^ inflated, armed with sensory hairs, accessoiy 

 flagellum delicate, 1-jointed. Autenna 2, peduncle rather stout, ultimate and pen- 

 ultiraate joints subequal, can-ying fascicles of setules, flagellum once and a half 



