IPHIMEDTA OBESA, 



AMPHIPODA. 



NATATORIA. 



219 

 PHOXIDES. 



IPHIMEDIA OBESA. 



Specific character. Cephalon anteriorly produced, but not much depressed. 

 Last segment of the pereion, and three first of the pleon, furnished on each 

 side of the dorsal central line with a posteriorly-directed tooth. 



Length 5 8 g inch. 



Iphimedia obesa. RATHKE, Beitr. zur Faun. Norwegens, Nov. Act. Leop. 



vol. xx. (1843), p. 89, pi. iii. fig. 1. SPENCE BATE, 



Ann. Nat. 2 ser. xix. p. 141, Feb. 1857. Cat. 



Amph. Crust. Brit. Mus. p. 123, pi. xxii. fig. 2. 



WHITE, Pop. Hist. Brit. Crust, p. 176, pi. x. fig. 6. 

 Microcheles armata. KROYER, Nat. Tidskr. sec. 2, vol. ii. p. 5. 



THE head, which is anteriorly produced, has the long 

 projection not curved downwards. The last segment of 

 the body and the first three of the tail are severally 

 furnished with two dorsal teeth, one being on each side 

 of the central line ; the posterior margin of the third 

 segment of the tail has likewise a strong tooth near the 

 centre, and another at the infero-posterior angle. The 

 eyes are somewhat reniform, and red in colour. The 

 antennae are subequal, and about one-fourth of the 

 length of the animal. The first pair of legs are weak, 

 and have the hand long, with the infero-distal extremiy 



