Aniathillina, Carinogammarus 501 



palm oblique, defiued by an obtuse coruer with several stroiig spiiies. 

 Peraeopods 1 — 5 comparatively short and stout. Peraeopod 3, 2*^ Joint oval, 

 narrowed distallv. Peraeopod 4, 2<^ Joint, especially in 9 , unusually broad, 

 rounded quadrangular. Peraeopod 5, 2'^ Joint much expanded, the rounded 

 lower lobe desceuding below the 3"^ Joint, a little in d, much in 9 . Uropod 3, 

 peduucle rather longer than broad, outer ramus nearly twice as long as peduncle, 

 its 2*^ Joint and the inner ramus small. Telson rather broader than long, 

 the narrowly rounded apices rather divergent, each lobe with 2 gpinules at 

 apex and a hair on outer margin. L. about 6 mm. 



Caspian Sea (bay of Karabugasj. 



4. A. spinosa U. Sars 1896 A. s. (A. cristata var. spinata O. Grimm in MS.), 

 G. 0. Sars in: Bull. Ac. St.-Petersb., ser. 5 u4 p. 442 t. 4 f. 7— IH. 



Agreeing with A. cristata (p. 499) in gnathopods 1 and 2 and many 

 other respects. Body moderately slender and compressed, peraeon segments 

 1 — 7 and pleon segments 1 — 3 each raised to a well defined dorsal back- 

 ward pointing triangulär expansion, successively Ijirger, pleon segment 4 

 ending dorsally in a small but well defined rounded expansion, segments 

 5 and 6 having only a few dorsal bairs. Eyes reniform, obliquely placed, 

 dark. Antenna 1, accessory ilagellum in d 6-jointed. Peraeopods 3 — 5 

 differing from those of A. cristata in having the 2^ Joint comparatively 

 narrower, and nearly alike in both sexes. Uropod 3 very short and thick, 

 outer ramus scarcely longer than peduncle, only arraed with 3 spinules and 

 some setules, 2*^ Joint very small, inner ramus scarcely longer than broad. 

 Telson short, much broader than long, lobes rather divergent, each with a 

 setule on outer margin and 2 hairs at rounded apex. L. ö 25 mm. 



Caspian Sea (southern part). Deptli 203 m. 



T). A. affinis O. Sars 1894 A. a., G. ü. Sars in: Bnll. Ac. St.-Petcrsb., ser. 5 

 v.l p. 207 t. Ü f. 9 — 19. 



Near to A. cristata (p. 499). and still nearer to A. maximoviczi. 

 Body short and stout. especially in 9, peraeon segments 1 — 4 or 1 — 5 

 quite smooth. peraeon segments 6 and 7, pleon segments 1 — 3 each with 

 acutely projecting triangulär dorsal carina, pleon segments 4 — 6 with no 

 projection but fine hairs and srüall subdorsal spinules. Eyes distinctly 

 reniform. Antenna 1, including 1^* Joint, slender, fiagellum once and a half as 

 long as peduncle, with 15 joints in 9 , to 30 in d, accessory fiagellum 3-jointed. 

 Gnathopod 1 in d, 6<^^ Joint rather tumid in the middle; otherwise the 

 gnathopods 1 and 2 are nearly as in A. cristata. Peraeopods 1 — 5 and 

 uropods 1 — 3 nearly as in A. maximoviczi. Telson rather longer than broad, 

 lobes a little divergent, with no armature, except 3 fine haii'S on each obtusely 

 pointed apex. L. 9 6, d 8 mm. 



Caspian Sea. Depth 4 - 6 m. 



50. Gen. Carinogammarus Stebb. 



1862 Gammaracanthtis (part.), Bäte, Cat. Amphip. Brit. Mus., p.201 j 1899 Carino- 

 gammarus, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.l p. 429. 



Distinguished from Gammarus (p. 460) by having carinate segments; 

 carina medio-dorsal only; relative proportions of peduncles of antennae 1 

 and 2, of gnathopods 1 and 2 and of inner and outer ramus of uropod 3 

 variable. 



9 accepted and 2 doubtful species. 



