Corophium " 689 



to the apex. Telson nearly as long as broad; apex narrowly truncate. Colour 

 uniformly pale yellowish. L. 4 mm. 



Arctic Ocean, North- Atlantic, Xorth-Sea and Skagerrak (Norway southwax'd from 

 Lofoten Islands; Bohusiän; East Erisian Coast, depth 19 — 56 m; Shetland Isles); 

 Kattegat; Bosphorus? " 



6. C. runeicorne DellaValle 1893 C. r., C, nmcinatum, A. DellaValle in: F. 

 Fl. Xeapel, u 20 p. 13, 369 t. 4 f. 7, t. 8 f. 1—16, 19 | 1898 C. runeicorne, Sowinski in: 

 Mem. Soc. Kiew, v.lö p. 456. 



In close agreement with C. affine, but with a few distinguishing 

 points. Antenna 1 in d, 1^* Joint with strong curved tooth directed forward 

 near the base; flagellum 8 — lü-jointed. Antenna 2 in d, ultimate Joint 

 of peduncle apparently without the distal tooth; 1^* Joint öf flagellum much 

 longer than 2*^ and 3<^ combined, and with 4 teeth or nodules on its lower 

 margin. Gnathopod 1, finger much longer than apex of 6*^ Joint, and with 

 subapical tooth very large. Gnathopod 2, finger without denticle, but broad 

 at base, and abruptly naiTOwed near apex. Peraeopods 1 and 2, finger 

 much longer than 5*^ and ß^^ joints combined. Telson apically rounded. Colour 

 pale yellowish, slightly brownish on the back. L. 4 — 5 mm. 



Bay of Naples, depth 10—20 m; Bosphorus, depth 44—85 m. 



7. C. robustum 0. Sars 1895 C. r., C. bidentatum, Gr. O. Sars in: Bull. Ac. 

 St.-Petersb., ser. 5 v.3 p. 304; t. 23 f. 10 — 16 | 1896 C r., Sowinski in: Mem. Soc. Kiew, 

 «;. 15 p. 376. 



Back broad, flattened; pleon segments distinct, but 5*^ from 6*^ not 

 very sharply. Head with obtuse-angied front. Side-plate 1 as in C. chelicome 

 (p. 687). Eyes small, dark. Antenna 1 in Q not ^/g as long as body, 

 in ö with densely setose peduncle; 2*^ Joint shorter in Q than in d, in 

 both considerably shorter than 1^*; flagellum shorter than peduncle, about 

 12-jointed. Antenna 2, even in 9 very robust, in d more than ^/g as long 

 as body; penultimate Joint of peduncle nearly as long as ultimate and 

 flagellum combined, apically produced to a moderately long, slightly curved, spini- 

 form projection, with small bilobed expansion within at its base; ultimate Joint 

 with recurved tooth above the middle and spiniform apical tooth ; flagellum scarcely 

 as long as ultimate Joint of peduncle. Peraeopods 1 and 2, 2*^ Joint laminar, 

 with long setae on front margin, 4*^ rather broad, about as long as 5*^ and 

 6*^ combined, in d densely setose in front. Peraeopod 5 considerably more 

 than half as long as body. Uropods 1 and 2, rami without spines on inner 

 margin. üropod 3, ramus pai'allel-sided. Telson ti'uncately triangulär. Colour 

 dark. L. 9 7, d 8 mm. 



Caspian Sea. Depth to 75 m. 



8. C. muoronatum O. Sars 1895 Cm., G. 0. Sars in: Bull. Ac. St.-Petersb., 

 ser. 5 V.3 p. 307 t. 24 f. 1—7 | 1896 Cm., Sowinski in: Mem. Soc. Kiew, u 15 p. 375. 



Segments of pleon distinct, 5*^ from 6*^ not very shai-ply. Head with 

 Sharp rostral point advanced beyond the naiTOw front corners. Eyes small, 

 rounded, dark. Antenna 1 more than ^3 ^s long as body, little setose; 

 1^*^ Joint longer than 2*^ and 3"^ combined, with 3 distant spinules; flagellum 

 subequal to peduncle, 12-jointed. Antenna 2 little more than half as long 

 as body, strong; penultimate Joint of peduncle inflated, with mucronate 

 projection reaching beyond middle of ultimate, and having a small tooth at 

 its base within, near to which the cylindric ultimate Joint of peduncle puts 



Das Tierreich. 21. Lief. : T. R. R. Stebbing, Amphipoda I. ii 



