Corophium 691 



t. 8 f. 4— 10 i 1889 C. c, Hock in: Tijdschr. Nederl. dierk.Ver., ser. 2 v.2 p. 230 j 1893 

 C. c, A. Della Valle io: F. Fl. Neapel, u20 p.367 t. 55 f. 58, 59 | 1894 C. c, G. 0. Sars, 

 Crust. Norway, v. 1 p. 615 t. 220 | 1896 & 98 C. c, Sowinski in: Mem. Soc. Kiew, v. 15 

 p.373, 455 I 1862 C. spinicorne (^) (non Stimpson 18571), Bäte, Cat. Amphip. Brit. 

 Mus., p. 281 t. 47 f. 5 | 1863 C. bonellii (part. : $), Bäte & Westwood, Brit. sess. Crust., 

 v.l p. 497 f. I ?1868 C. b., Czeruiavski in: Syezda Russ. Est., Syezda 1 Zool. p. 96. 



Body broad, pleou segments 4 — 6 coalesced. Head, rostrum short, 

 distinct, acute; lateral lobes prominent, acute. Side-plate 1 with 3 setae on 

 the produced apex. Eyes small, rounded, dark brown with whitish coating. 

 Antenna 1 scarcely 7» as long as body in Q and less than 7» ^^ ^ '■> 1^* Joint 

 nearly as long as 2^ and 3*^ combined, thick above, with 4 recurved spines at 

 base, compressed below with row of about 6 spines; S"^ Joint much shorter 

 than 2^; flagellum shorter than peduncle, 6-jointed. Antenna 2 in d (Fig. 117) 



FlageUum 



^ — Flagellum 



Uropod 1 

 Uropod 3 — -/^ 



Fig. 116. Fig. 117. . Fig. 118. 



Antenna 2, ?. Antenna 2, (J. Uropods i— 3 and telson. 



Fig. 116—118. C. crassicorne. [After G. 0. Sars.] 



stout, scarcely as long as body; peuultimate Joint of peduncle large, with 2 apical 

 teeth, the outer reaching the sub-basal tooth of the ultimate, which is much 

 shorter and narrower than the penultimate, and has a small apical tooth, a little 

 separated from line of lower margin; l^* Joint of flagellum with long setae. 

 Antenna 2 in Q (Fig. 116) little longer than antenna 1, stout; antepenultimate 

 Joint of peduncle with 3 or 4 stout spines, penultimate with 8 — 12 such 

 spines along the sharp edge of its broad laminar expansion; ultimate Joint 

 of peduncle little more than half as long, with a strong median spine. 

 Gnathopods 1 and 2 as in C. volutator (p. 686), except that the sleuder 

 finger of gnathopod 2 has an inner denticle. Peraeopods 1 — 5 as in C. 

 volutator, except that in peraeopods 1 and 2 the finger is relatively longer, 

 in peraeopods 3 and 4 the 4*^ Joint less setose, and that peraeopod 5 is some- 

 what more slender. Uropod 3, ramus oblong oval, nearly twice as large as 

 peduncle (Fig. 118). Telson rather more obtusely rounded than in C. volutator. 

 Colour whitish mottled with light brown. L. about 5 mm. 



Arctic Ocean, North- Atlantic with adjoining seas (Jan Mayen; Eiirope from Vadsö 

 [Norway] to West-France, depth 11 — 37 m); Bosphorus. Found in Norfolk in almost 

 fresh water. 



12. C. bonellii (M.-E.) 1830 Corophia b., H. Milne Edwards in: Ann. Sei. nat., 

 V. 20 p. 885 I 1840 Coro2)hium b., H. Milne Edwards, Hist. nat. Crust., v. 3 p. 67 | 1862 

 C.b., Bäte, Cat. Amphip. Brit. Mus., p. 282 | 1893 C.bonelli, A. Della Valle in: F.Fl. 

 Neapel, v.20 p. 368 [ 1894 C. b., G. 0. Sars, Crust. Norway, v.l p. 616 t. 221 f. 1. 



9 . Pleon Segments 4 — 6 coalesced. Head without proper rostrum, front 

 produced in a broad triangle; lateral lobes short, apically rounded. Eyes 

 large, very dark. Antenna 1 about Vs as long as body; P* Joint slightly 

 shorter than 2^ and 3*^ combined, with small hooked spine near base and 



41* 



