184 



GAMMARID7E. 



A MPHIPODA . 

 NATATOItlA. 



PH OXIDES. 



DARWINIA COMPRESSA. 



Specific character. Cephalon produced to an obtuse point. Fourth seg- 

 ment of the pleon considerably narrower than the third. Superior antennpe 

 longer and stouter than the inferior. 



Length 5 7 g inch. 



Danvinia compresta. SPENCE BATE, Brit. Assoc. Rep. 1855, p. 58. Ann. 



Nat. Hist. 1 ser. xix. p. 141, Feb. 1857. Cat. 

 Amph. Crust. Brit. Mus. p. 108, pi. xvii. fig. 7. 

 WHITE, Hist. Brit. Crust, p. 176. 



THE head is produced anteriorly to an obtuse point. 

 The body is much distended, and increases in breadth to 

 the third segment, whence it as gradually decreases pos- 

 teriorly. The tail is narrow, with the third segment 

 shorter than the preceding ; the three last segments are 

 extremely short, and generally lie folded, closely com- 

 pressed, beneath the body of the animal, a circumstance 

 which suggested the specific name. The eyes are round, 

 and situated between the superior and inferior antennae. 

 The superior antennae are about one-fourth the length of 

 the animal, but longer and more robust than the inferior ; 



