362 
GAMMARIDiE. 
Gammarus carinatus. Johnston, Zool. Journ. iv. 52 (not of Fabricius, 
Ent. Syst. ii. 515, which = Atylus carinatus , 
Leach). 
Amathia carinata. White, Hist. Brit. Crust, p. 182. Spence 
Bate, Rep. Brit. Assoc. 1855, p. 58. Ann. 
Nat. Hist. 2 ser. xix. p. 143. Bruzelius, 
Skan. Amph. Gramm, p. 50 (not Rathke). 
Dexamine? carino-spinosa. White, Cat. Crust. Brit. Mus. 1847. Cat. 
Brit. Mus. 1850. Hist. Brit. Crust, p. 178 
(but not of Turton, Syst. Nat. iii. p. 760, 
which is Atylus carinatus). 
Amphithoe carino-spinosa. Gosse, Mar. Zool. i. p. 141. 
Amathia carino-spinosa. Spence Bate, Cat. Amph. Brit. Mus. p. 199, 
pi. xxxv. fig. 11. 
Amphithoe Moggridgei. Spence Bate, Ann. Nat. Hist. 2 ser. vii. p. 318, 
pi. x. fig. 10, 1855. Gosse, Mar. Zool. i. p. 
141. 
Gammarus angulosus. Rathke, Nov. Act. Acad. Leop. xx. p. 72, t. iii. 
fig. 3. Liljeborg, Ofvers. af Kongl. Yet. 
Akad. Forhandl. 1851, p. 23, No. 62 ; 1853, 
p. 447 ; 1855, p. 124, No. 15. Bruzelius, 
Skand. Amph. Gramm, p. 50. Frey u. Leuck- 
ardt, Beit. z. Kenntn. wirbellos. Thiere, 
p. 162 (in Bruzelius, 1. c.). 
The head is anteriorly produced to a small rostrum. 
A carina traverses the median line of the back, increasing 
in height to the penultimate segments of the tail ; the 
three posterior segments of the body, and the first two 
of the tail, being produced posteriorly into a sharp 
tooth. There is also a slight carina separating the 
dorsal from the lateral regions of the animal in the last- 
mentioned segments. The fourth and fifth segments of 
the tail have the carina posteriorly terminating in an 
obtuse edge, the dorsal margin of each being slightly de- 
pressed at the centre ; the surface of the skin being rather 
rough, with a row of minute granules on the posterior 
margin of each segment. The eyes are reniform. The su- 
perior antennae are scarcely half the length of the animal. 
The flagellum is as long as the peduncle, having the 
