46 T. V. HODGSON. 



setse on its ventral surface, and proximally there is a row of some four to six very- 

 strong spines ; dorsally the setse are similar, but not so thickly distributed nor so 

 strong ; laterally also they occur, and there appears to be a narrow band devoid of 

 setse, but this is not distinct. The terminal claw and its auxiliaries arise from a process 

 on the ventral side of the prolongation alluded to above. 



The type of this species is an adult male bearing eggs, taken in Winter Quarters at 

 a depth of 125 fm., 9 Feb., 1903. Another was found at a depth of 35 fm., 5 March, 

 1903. The ova are small and are carried in a large, rather irregular mass round the 

 fourth and fifth joints of the oviger. The Genital apertures occur ventrally at the distal 

 extremity of the second coxa of the two posterior legs. They are large, with tumid 

 lips. Genital apertures of the female are on all the legs. A male and a female were 

 also taken off Cape Wadworth, Coulman Island, in 8-15 fm., 15 Jan., 1902. These 

 are smaller than the type. 



Leionymphon australe. 



(Plate VII., fig. 1.) 



Specific characters : — 



Body robust, with three low rounded transverse ridges; these ridges are more prominent 

 ventrally. Abdomen directed obliquely upwards, and well behind posterior trunk articulation. 



Proboscis pyriform, little shorter than the body. 



Palp 9-jointed, the seventh and ninth being a little the longest of the five terminal joints. 



Oviger 10-jointed, without a terminal claw, the lasb four joints with an irregular series of 

 denticulate spines. 



The body is robust and, without taking the lateral processes into consideration, 

 broadest about the third process, from which it gradually narrows forwards. 



The Cephalon is but slightly expanded and the neck is not distinct. The entire 

 body measures 9 mm. in length, of which 4 mm. are taken up by the proboscis ; the 

 Abdomen does not enter into consideration, as in its natural position it is carried 

 obliquely upwards, and does not extend beyond the last pair of lateral processes ; it 

 is, however, 1^ mm. long. Segmentation is distinct, except so far as regards the 

 abdomen, and occurs on a low ridge which crosses the body immediately behind the 

 lateral processes. These ridges also occur ventrally and, being reflected backwards, 

 give to each segment the appearance of being socketed into a recess. The lateral 

 processes are not widely separated, but the intervals increase slightly from before, 

 backwards ; all are provided at their distal extremities with two small spur-like 

 processes ; these are dorsal. 



The Ocular tubercle is stout, moderately tall, rounded at the apex, and bears four 

 well-developed eyes. 



The Proboscis is movably articulated to the body and pyriform in shape, its 

 diameter increases for more than a third of its length, and then enlarges abruptly, 

 and is marked by three double bands, presumably muscle bands, transversely divided 

 near the tip. The mouth is triangular, not large, but with thick lips. 



