232 



GAMMARID.E. 



AMPHIPODA, 



NATATORIA. 



PHOXIDES. 



ACANTHONOTUS OWENII. 



Specific character. Posterior segments of the pereion, and anterior ones 

 of the pleon, dorsally elevated into carinal teeth. Antennae scarcely one- 

 fourth the length of the animal. Grnathopoda slender. Telson deeply cleft. 



Length ^ inch. 



Acanthonotus (?) Owenii. 



Acanthonotus testudo. 



Vertumnus Cranchii, Leach, MSS. 



Acanthonotus Crancliii. 



SPEKCE BATE, Rep. Brit. Assoc. 1855, 

 p. 58. Ann. Nat. Hist. 2 ser. vol. xix. 

 p. 141. 



WHITE, Cat. Brit. Crust, p. 51 (1850). 

 Pop. Hist. Brit. Crust, p. 1 7 7. SPENCE 

 BATE, Cat. Amph. Crust. Brit. Mus. 

 p. 127, pi. xxiii. fig. 3. GTOSSE, Man. 

 Mar. Zool. p. 42 (1855) (not Oniscus 

 testudo, Mont, see ante, p. 228.) 



WHITE, List Crust. Brit. Mus. p. 89, 

 1847. 



WHITE, Cat. Crust. Brit. Mus. p. 57, 

 1847. 



THE head is anteriorly produced to a point, deflexed 

 between the antennae. The last segments of the body, 

 and the four anterior of the tail, are elevated into a ca- 

 rina ; the middle of the posterior margin of each segment 

 is produced into a strong tooth ; the three anterior seg- 



