Rev. T. R. R. Stebbing on AmpMpodous Crustacea. 11 



the eye is situated ; and the effect produced is that of a mouth 

 with a curiously protruding chin below it. 



The principal specific distinction consists in the ornamenta- 

 tion of the fourth and fifth segments of the pleon : the fourth 

 has its hinder margin produced centrally into three sharp sub- 

 equal teeth ; the fifth has a pair of teeth at each side of its 

 hinder margin. From each interval between two teeth, from 

 the centre of the sixth segment, and from the two ends of the 

 deeply cleft terminal tail-piece there is to be seen a conspicu- 

 ously projecting seta or spine, those of the tail-piece in the 

 same line with it, the others being directed upwards and 

 outwards. 



The specimen here described and figured was taken under 

 a stone in Salcombe Harbour. Its colour was orange, mottled 

 with rose-red; its length, not including the antennse, three 

 tenths of an inch ; the inferior antennse about half the length 

 of the animal. Another specimen, taken subsequently with 

 the dredge in the same locality, is evidently the female of this 

 species, the only observable differences between the two spe- 

 cimens being that the latter has a pouch containing eggs, and 

 the second pair of gnathopoda agreeing in shape with the first 

 pair. 



IpMmedia Eblance, variety. PL II. fig. 4. 



The variety of this species now to be described was dredged 

 in Torbay. My friend Mr. Arthur Hunt sent me, a few weeks 

 back, a small pan of sea-water containing crabs and other 

 marine animals. Among these, two minute crustaceans had 

 been accidentally included, one of them being unmistakably 

 Iphimedia ohesa, the other apparently IjyMmedia Ehlance. 

 The two differed in colour — the former being a speckled brown, 

 much set off by the bright red eyes, while the latter was bright 

 salmon-red of two shades mixed all over. This latter agrees 

 with /. Ehlance in the length of the first and last segments of 

 the body, in having the thighs of the last two pairs of walking- 

 legs produced posteriorly into two sharp points or teeth, in the 

 strongly hooked character of the latero-dorsal teeth of the 

 third segment of the pleon, and in the shape of the coxa3 of 

 the last three pairs of walking-legs. It differs, however, in 

 the entire absence of the remarkable peculiarity assigned to 

 /. Ehlana^, of having " the first three segments of the tail 

 armed with a central dorsal tooth, directed posteriorly." The 

 thigh of the fifth pair of legs, moreover, is produced posteriorly 

 into one point only, instead of into two. 



The circumstances above mentioned under which the two 

 Torbay specimens were obtained suggested the idea that they 



