140 



GA.MMARIDJ;. 



AMPHIPOBA. 



NATATORIA. 



PIIOXIDES. 



PHOXUS SIMPLEX . 



Specific character. Superior antennas scarcely reaching beyond the ex- 

 tremity of the cephalon. Inferior antennae nearly three times as long as 

 the superior. Three anterior coxag having four simple hairs near the hinder 

 angle of the inferior margin. 



Length, ^g inch. 



Phoxus simplex. Spence Bate, Ann. Nat. Hist. 2 ser. 1857, vol. xx. p. 525. 



Cat. Amph. Brit. Mus. p. 97, pi. xvi. fig. 1. 

 Phoxus Kroycri. Si'ence Bate, Synopsis, &c. Ann. Nat. Hist. Feb. 1857, 



2 Ser. xix. p. 152. Brit. Assoc. Eep. 1855, p. 58 (not 



of Stimpson in Proc. N. Hist. Soc. Boston). White, 



Hist. Brit. Crust, p. 173. 



This species has the dorsal surface of the head con- 

 siderably produced, and gradually narrowed, without 

 being curved downwards, and with the apex obtusely 

 rounded. The eyes have not been observed, owing pro- 

 bably to the circumstance of the animal not having been 

 examined until some time after death, whence we are led 

 to suppose that they are imperfect in their structure. 

 The superior antennae are very short, scarcely reaching 

 beyond the extremity of the overhanging head ; the 



