Ö90 Corophium 



forth a small recurved tooth; flagellum rather shorter than ultimate Joint of 

 peduncle. Peraeopods 1 and 2, 2*^ Joint decidedly laminar, 4*'^ distally 

 Wide, with slender setae on front, finger subequal to the stoutish 6^^ Joint. 

 Peraeopod 5 about half as long as body; 4^^ — 6*^ joints rather broad and 

 compressed, bordered with fascicles of slender setae. L. d 6 mm. 



Caspian Sea. 



9. C. eurvispinum 0. Sars 1895 C. c, G. 0. Sarsin: Bull. Ac. St.-Petersb., ser. 5 

 V.3 p. 302 t. 23 f. 1—9 ,' 1896 C. c, Sowinski in: Mem. Soc. Kiew, v. 15 p. 375. 



Segments of pleou distinet, 5*^ from 6*^ not very sharply. Head 

 slightly angular at centre; front corners narrow, rather prominent. Eyes 

 small. Antenna 1 in d very setose; 2^ Joint of peduncle fully as long as P'; 

 flagellum scarcely longer than 2*^ and 3^ joiuts of peduncle combined, 12-jointed. 

 Antenna 1 in 9 scarcely Va as long as body, sparingly setose; 1^* Joint of 

 peduncle as long as 2*^ and 3^ combined, with 4 or 5 spinules below; 

 flagellum shorter than peduncle, 9-jointed. Antenna 2 in ö nearly as long 

 as body, penultimate Joint of peduncle widening distally, produced to a 

 ßtrongly incurved spiniform tooth, with slightly cleft tooth at its base within; 

 ultimate Joint of peduncle nearly as long as penultimate, cylindric, a recurved 

 tooth near the base meeting the incurved point of the penultimate; flagellum 

 shorter than ultimate Joint of peduncle. Antenna 2 in o much less strongly 

 developed. Gnathopods 1 and 2 of the usual character. Peraeopods 1 and 2 

 Short and stout, 2^ Joint laminar, 4*^ nearly as broad as long, setose on 

 both margins; finger as long as 6*^ Joint. Peraeopod 5 slender, about 

 half as long as body. üropod 2 short and stout, spines on the rami not 

 numerous. üropod 3 not very stout. L. 9 6, d 7 mm. 



Caspian Sea. 



10. C. monodon O. Sars 1895 C. m., G. O. Sars in: Bull. Ac. St.-Petersb., 

 ser. 5 v.S p. 309 t. 24 f. 8— 16 | 1896 C. m., Sowinski in: Mem. Soc. Kiew, ».15 p. 374. 



Body rather slender, especially in d. Pleon Segments all distinet. 

 Head, rosti'al projection almost a right angle, front corners narrow, little 

 prominent. Eyes large, rounded, dark. Antenna 1 less than half as long as body; 

 peduncle in d setose below, in 9 sparingly setose; l^"*^ Joint longer than 2* 

 and 3*1 combined, with 1 spinule at end of the Joint; flagellum in d shorter 

 than peduncle, 12-jointed, in 9 as long as peduncle, 10-jointed. Antenna 2 

 in d about ^/g as long as body; penultimate Joint of peduncle not greatly 

 inflated, almost cylindric, produced to a simple narrowly mucronate tooth, 

 not nearly reaching middle of ultimate and without inner tooth; ultimate Joint 

 with rudiment only of a tooth near base; flagellum scarcely half as long as 

 ultimate Joint of peduncle. Antenna 2 in 9 not longer than antenna 1, 

 about Vs as long as body, without even rudiment of a tooth on ultimate Joint of 

 peduncle. Peraeopods 1 and 2 slender; peraeopod 5 about half as long as 

 body. üropod 2 very small, compared with üropod 1. üropod 3, ramus 

 much narrower than peduncle, with 1 spine among a few apical setae. 

 Peraeon segment 7 and the rest of hind part of body almost devoid of 

 pigment. L. 9 4, d 5 mm. 



Caspian Sea. Depth to 75 m. 



11. C. erassicome Bruz. 1859 C. c, R. M. Bruzelius in: Svenska Ak. Handl., 

 n. ser. v. 3 nr. 1 p. 15 1. 1 f. 2 [ 1876 C. c, A. Boeck. Skand. Arkt. Amphip., v. 2 p. 626 

 t.28 f. 8 j 1879 C. c. (part.), Hoek in: Tijdschr. Nederl. dierk. Ver., t;.4 p.ll5 t.5 f. 16, 



