DEXAMINE SPINOSA. 



AMPHIPODA. 



NATATORTA. 



237 



OAMMARIDES. 



Cancer (Gammarus) spinosus. 

 Dexamine spinosa. 



DEXAMINE SPINOSA. 



Specific character. Eacli of the four anterior segments of the pleon ele- 

 vated into a large posteriorly-directed tooth ; first joint of the i^eduncle of 

 the upper antenna? with a blunt tooth. 



Length \ inch. 



Montagu, Linn. Trans, vol. xi. t. ii. fig. 1. 

 Leaoh, Edin. Encyc. vii. p. 433. Zool. Misc. 



ii. p. 23. Linn. Trans, xi. p. 359. Enc. 



Brit. Suppl. i. 425. Samouelle, Ent. 



Comp. p. 102. Thompson, Nat. Hist. 



Ireland, iv. p. 395. Desmarest, Consid. 



sur les Crust, p. 263, pi. xlv. fig. 6. 



White, Cat. Brit. Crust. (1849), p. 49. 



Hist. Brit. Crust, p. 178, pi. x. fig. 7. 



Spence Bate, Brit. Assoc. Rep. 1855, p. 58. 



Ann. Nat. Hist. 2 ser. xLx. p. 141, 1857. 



Cat. Amph. Brit.Mus. p. 130, pi. 24, fig. 1. 

 Milne-Edwards, Ann. des Sci. Nat. xx. 



p. 375. Hist, des Crust, t. iii. p. 40. Cuv. 



Regne Anim. Edit. Crochard, pi. 60, fig. 6, 

 Milne-Edwards, Hist, des Crust, iii. p. 25. 

 Gosse, Mar. Zool. p. 141, f. 266. 



Amphithoe Marionis, 



Acanthonotus ? spinosus. 

 Amphitoe spinosa. 



The head has the anterior margin produced in the 

 centre into a little flat rostrum. The body of the ani- 



