358 Transactions. — Zoology. 



3-jointecl, the 2nd joint being however very indistinctly 

 marked by a short spine. The oral j^'^'ohoscis is normally 

 developed ; the extremity of the mandibles ends in a finely- 

 serrate margin ; the palp is 2-jointed. The first foot-jairs 

 are long and slender ; the terminal hook-like joint bears 

 about its middle a stout, fringed, blunt spine, and somewhat 

 nearer the end a tuft of 5 set®. The second foot-jaivs very 

 stout and indistinctly 2-jointed. 



All the thoracic feet are 2-branched. In i\\e first pair both 

 branches are 2-jointed : the outer branch has a large basal 

 joint produced rather obliquely into a tooth-like spine ; the 

 2nd joint bears 4 spines and 3 plumose setae : '■' in the inner 

 branch the 2nd joint bears 3 setae. In the second pair both 

 branches are 3-jointed : of the outer branch the 1st joint is 

 elongated and bears a long seta on the inner margin ; the 2nd 

 is finely fringed along its outer edge — -which ends in a stout 

 spine — and bears a seta on its inner edge ; while the terminal 

 joint bears 3 spines and 5 setae : of the inner branch the joints 

 are subequal in length ; the 1st bears on its inner margin one 

 long seta, the 2nd bears 2 on the same margin, while the 

 last has 6. In the third pair the outer branch is 3- and the 

 inner 2-jointed ; in the outer the 1st joint ends in a spine on 

 the outer margin and carries a long seta on the inner ; the 

 2nd joint is shorter, but otherwise similar ; the 3rd ends in 

 3 spines and bears 5 setae on its inner margin : of the inner 

 branch the 1st joint is terminated on its inner margin by 2 

 long setae, while the 2nd joint lias 4 such setae. 



The fourtJi pair of feet in the inale consists of 2 short 

 branches, each 2-jointed, but having no plumose setae ; in the 

 outer branch the 1st joint is obliquely produced into a short 

 spine on its outer margin, the 2nd joint bears 7 spines ; in the 

 inner branch the 1st joint ends in a spine on its inner side, 

 and the 2nd bears 4 spines. 



In the female, the same limb consists of 4 broad, flat, gill- 

 like lamells, each branch bearing a short rounded, and an 

 elongated oval, lobe ; the margin of all these lobes is quite 

 entire, and has no trace of spines or setae. 



Each caudal lamella has its outer edge incurved and pro- 

 duced into a tooth, from below which a short spine springs ; 

 tlie inner edge is smooth and rounded, while the extremity 

 bears 3 spines. 



Colour dark greyish-brown. 



Ilab. Found on a large shark (species not stated) by Mr. 

 A. Hamilton, of Napier, after whom I have much pleasure in 

 naming the species. 



* Unless otherwise specified all the seta^ on the thoracic feet of 

 Dincmatura are finely fringed, like feathers. 



