144 THE VOYAGE OF H.M.S. CHALLENGER. 



last segment are articulated close to its posterior boundary. The abdomen is rather more 

 than one-fourth of the length of the thorax ; the first segment is a little longer than any 

 of the four following which are subequal ; the terminal segment is of course longer, and 

 ends in a flattened scale-like telson, which is rounded at its free extremity. 



The antennules are furnished with a long flagellum, but it is difficult to indicate 

 precisely the limits of flagellum and peduncle. The basal joint is stout, and the longest 

 of the whole appendage; the second joint is much shorter, the third a little lunger than 

 this, and the fourth very short but of equal diameter; then follows the flagellum, the 

 proximal joints of which do not differ from the distal joints of the peduncle ; the first 

 joint is the largest, the remaining nine decrease gradually in width, but increase slightly 

 in length towards the extremity. The antennules are altogether longer than the 

 head. 



The antennas are shorter than the foregoing appendages ; the peduncle is five-jointed ; 

 the basal joint is very short, the second joint is the longest, and is excavated along its 

 outer and inferior border, apparently to make room for the dilated proximal joint of the 

 antennules ; the following joints are short and stout, the distal joint being the longest 

 and most slender; the flagellum is four-jointed and very slender, the proximal joint is 

 the longest, the others progressively but very gradually diminish in length ; the last joint 

 is tipped with a bundle of fine hair-like setae. 



The first pair of thoracic appendages are chelate ; the second and third pairs are also 

 chelate, but more slender than the anterior pair, the remaining appendages similar to each 

 other and without a dilated penultimate joint. First pair of abdominal appendages 

 serrate along the inner margin and a part of the outer ; remaining pairs with long 

 plumose hairs. Uropoda of the characteristic form, overlapping the posterior abdominal 

 segment and telson ; the outer ramus is square and truncated at its extremity ; the 

 inner ramus is two-jointed, serrated, and furnished with a few short hairs along the 

 inner margin. 



Station 169, off New Zealand, July 10, 1874; lat. 37° 34' S., long. 179° 22' E.; 

 depth, 700 fathoms ; bottom temperature, 40° F.; blue mud. 



.' 



Paranthura neglecta, n. sp. 



This species is represented by a single specimen from Kerguelen ; I imagine the 

 specimen to be immature from the absence of a seventh thoracic segment. 



The length of the specimen is 6 mm. 



The head is furnished with a pair of lateral eyes, each containing eleven or twelve 

 facets; the head is produced laterally beyond the insertion of the antennules; it is 

 about equal in length to the following thoracic segments, which arc themselves subequal 



The attachment of the thoracic appendages appears to be much the same as in the 



