ox CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOITH SEAS. fi 1 7 



scarcely longer than the first joint of the inner, which is five-jointed : the rami are 

 tipped with long setae. 



Length, 2'5 mm. 



Habitat. Lifu, Loyalty Islands. 



The form shown in Plate LXIV D differs slightly from that above described, 

 having the processes of the thumb in the first gnatliopods separated by a narrow 

 interval instead of a wide one, a distinction corresponding to that which Dollfus notes 

 as separating L. savignyi, Kriiyer, from L. aUjicola, Harger, and L. Corsica, Dollfus, 

 without making it very sure that all those three .species may not in i-eality be one 

 and the same. 



Habitat. Isle of Pines: from sponge. 



Leptochelia lifuensis n. sp. $ 

 Plate LXIVc. 



$. In keeping the description of the female separate from that of the male 

 I am influenced by the circumstance that the specimens assignable to the former 

 sex attain a size so much greater than is shown by any specimens of the latter, that 

 doubt as to the identity of the species is not altogether excluded. 



Apart from the size, the differences though very considerable are only such as arc 

 known to occur in the two sexes of this genus. 



In the first antennae the stout first joint is three times as long as the second, 

 the second is but little longer than the narrower third, to which succeeds a minute 

 apical joint tipped with long setae. Exceptionally in place of the thinl jdint there are 

 two joints, together not much longer than the single joint. 



The .second antennae are much larger than in the male, the fii'st three joints short, 

 the second and third each tipped at each side with an outstanding pellucid spine, the 

 fourth joint much longer, having a dark band across the middle ; the short slender 

 flagellum as in the male consisting of one principal joint between two that are 

 microscopic, the apical perhaps itself subdivided, tipped with long setae. 



The mouth-organs agree closely with the figures and descriptions given by Sars 

 in 1886 for those of the female of Leptochelia dubiu (Kriiyer). In the first n)axillae 

 the little crowded apical spines appear to be eleven in number. The backward-directed 

 palp has an indistinct appearance of being two-jointed, and ends in two nne(iual setae. 



The fir.st gnathopods are .stout, the thumb short and thick, with five setules on 

 its outer margin, the distal part of the inner crenate, the proximal part excavate, the 

 finger having a prominence of its crenate inner margin corresponding with the 

 emargination of the thumb, the apex of the finger not (juitc reaching that of the 

 thumb. 



The other limbs agree with those in the male, and the same is true of the 

 uropods, which have a five-jointed iimer, and a small but distinctly two-jointed outci- 



