^24 "IHBTIS " SCIENTIFIC RESULTS. 



The mouth-organs are in close agreement with those of the 

 " Challenger " species, Podocerus dance, and the same remark 

 applies to the small first gnathopods, which are alike in both 

 sexes. 



The second gnathopods of the female are like those of P. daiice, 

 but the second gnathopods of the male differ much from the 

 pattern found in that species. They ai-e distinguished from those 

 of the female in slightly superior size, and in the circumstance 

 that the palm, instead of i)ursuing a practically unbroken curve 

 to the finger-hinge, before reaching that point forms a small 

 tooth process followed by a slightly serrated setiferous flattened 

 edge. In each sex the finger curves over the palm-defining pro- 

 jection of the short hind margin, within which one or two palmar 

 spines are seated. 



The peraeopods differ but little from those of P. dance. The 

 second joint even in the last three pairs is little dilated. All the 

 joints except the short third and the strong fingers have several 

 spines and setse to which in preserved specimens extraneous 

 matters cling, as they do also to the body processes. As in other 

 species of the genus all the limbs have a desperate facility of 

 detaching themselves from the bodies to which they properly 

 belong. 



The first and second uropods have the outer ramus shorter than 

 the inner but longer than the peduncle. The first pair are much 

 larger than the second. The third pair consist each of a mem- 

 branaceous oval piece, shorter than the telson, and tipped with a 

 single setule. 



The telson is more or less conical, with a spinule on each side 

 where it contracts towards its blunt end. This is armed with 

 two pairs of spines, the median pair the longer. Ventrally there 

 is a membranaceous plate, broader than long, with a set of three 

 setules on each side near the broadly rounded apical margin. 

 Length of an average specimen about 7 mm. 



The specific name, from the Greek vsTpi^, porcupine, alludes 

 to the numerous processes of the body, and will serve to emphasize 

 the resemblance which this species bears to Lcelmatophilus hystrix 

 in a neighbouring genus. 



Localities. — Off Manning River; off Port Hacking; Botany 

 Bay, 50-52 fathoms ; off Wata Mooli, 54-59 fathoms. 



Genus I C I L I U S , Dana. 



Icilius, Dana, Amer. Journ. Sci., (2), viii., 1849, p. 140. 

 Icilius, Stebbing, Das Tierreich, xxi., 1906, p. 706. 



So recently as 1906 I was willing to accept the decision which 

 Professor Delia Valle published in 1893, that, although four 



