A MP HI POD A. 

 NATATOKIA. 



AMPELISCA GAIMARBH. 127 



AMPELI8CIDES, 



AMPELISCA GAIMAKDIl. 



Specific character. Posterior margin of the tliird 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, | inch. 



A mpelisca Gaimardii. 



Araneops diadcma. 

 Tefromatus typicus. 



Kroyee, Voyage en Scand. Crust, pi. xxiii. fig. 1. 



Spence Bate, Cat. Amph. Brit. Mus. p. 91, pi. 



XV. fig. 1. 

 A. Costa, Rend, del Accad. Sc. di Nap. 1853, p. 



171, Tav. i. fig. 1. 

 gpENCE 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 mvich 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 



