360 Transactions. — Zoology. 



3 setae : of the inner branch, the 1st joint has entire margins, 

 the 2nd is finely serrated on the outer margin, and bears 3 

 long setae directed inwards. The second pair has both its 

 branches 2-jointed, but the outer branch has traces of a di- 

 vision in its terminal joint : in this branch the 1st joint ends 

 in a spine on the outer and a seta on the inner margin : the 

 2nd joint has a seta on the middle of the inner margin (which 

 probably marks the division-line between the 2nd and 3rd 

 joints), 5 set£e round the extremity, and 4 spines on the outer 

 margin, which is also furnished with a finely-serrated fringe : 

 in the inner branch the 1st joint ends on the inside in a seta, 

 while the 2nd joint bears 7 setae towards its extremity. The 

 third pair of feet has both branches 3-jointed : the outer 

 branch has the 1st and 2nd joints each ending in a spine on 

 the outer and a seta on the inner margin ; the 3rd joint has 

 3 spines on the outer margin and 5 setae round the extremity : 

 the inner branch has its 1st joint provided with a seta on the 

 inner margin, the 2nd joint with a spine on the outer and a 

 seta on the inner margin, and the 3rd has 4 setae round the 

 extremity. The fourth pair of feet in the viale has the outer 

 branch 3-jointed, and the inner 2-jointed : in the former the 

 1st and 2nd joints end in a strong spine on the outer and a 

 seta on the inner margin ; the 3rd joint has 3 teeth on the 

 outer margin, and 4 setae at the extremity : in the inner 

 branch the 1st joint ends in a long seta on the inner margin, 

 and the 2nd has 4 setae ; both joints are finely fringed on the 

 outer margin. In the female each branch consists of a single 

 joint, but the outer is deeply notched as if showing traces of 

 a division : the outer branch is oval in form, its outer margin 

 being produced about the middle into a strong spine ; towards 

 the end it bears 4 or 5 spines and has traces of denticulation 

 along its inner margin : the inner branch is shorter than the 

 outer, and is also denticulated with about 7 slight notches. 



The last thoracic segment in the female, when seen veii- 

 trally, ends in a pointed lobe on each side, which projects 

 beyond the extremity of the dorsal lamellae, and reaches as 

 far back as the end of the caudal lamellse. 



Hah. Numerous specimens of this species were obtained 

 for me by the captain of the whaling barque " Splendid," pre- 

 sumably off a shark ; unfortunately he omitted to record the 

 host. 



4. Dincmatura carcharodonti, n. sp. Plate XXVI., fig. 

 2, a-d. 



Female. — Body only slightly arched upwards. Cephalo- 

 thorax one-third as long as body, nearly round, rather broader 

 than long, with a very distinct marginal flange ; posterior 

 angles sub-acute. Hind portion of the body long and narrow, 



