AMPELISCA G AIM AUDI [. 



AMPHIPODA. 



NATATOltlA. 



AMPELISCIDES. 



AMPELISCA GAIMARDII. 



Specific character. Posterior margin of the third segment of the pleon 

 plain. Superior antennas one-third the length of the animal. Inferior an- 

 tennae very slender, two -thirds the length of the animal. 



Length, f inch. 



Ampelisca Oaimardii. KKOYER, Voyage en Scand. Crust, pi. xxiii. fig. 1. 



SPENCE BATE, Cat. Amph. Brit. Mus. p. 91, pi. 



xv. fig. 1. 

 Araneops diadema. A. COSTA, Rend, del Accad. Sc. di Nap. 1853, p. 



171, Tav. i. fig. 1. 

 Tetromatus typicus. SPENCE BATE, Brit. Assoc. Rep. 1855, p. 58. Synop. 



Ann. Nat. Hist. ser. 2, xix. p. 139. WHITE, Hist. 



Brit. Crust, p. 171, pi. x. fig. 4. 



THE anterior half of the animal is much more com- 

 pressed than the posterior, and narrowed to an angle 

 upon the dorsal surface, the angle increasing anteriorly 

 to the extremity of the head. The eyes consist of simple 



