NEMERTINEA— BAYLIS. 121 



ImiiiUes of Hl}rfs hcldugiug to this layer are somewhat scattered, and are eiiilieddeil 

 ill a coiisich^rahh' ainoiiiit of gelatiiious and solid-h)oking couiieetive tissue. 



The eircuhir inusele-hiyer (CM.) is thiu. Between it and the outer longitudinal 

 muscles lie the large lateral nerve-stems (L.N.). 



The inner layer of longitudinal muscles (L.]\P.) is coiuiiaiativel}" thick and dense. 

 Beneath it lie the prolioseis-sheatli (P.S.), the gut, and a certain amount of loose 

 connective tissue. In this connective tissue, between the muscles and the i>ut, there 

 are numerous large spaces, some of which are proljably lilood-siuuses, Imt others appear 

 to be the gonadial sacs. The former are situated dorsally and ventrally, the latter at 

 the sides. In the anterior part of the series of sections these gonadial spaces are 

 empty, Ijut more posteriorly ova are beginning to be developed from their walls. The 

 ova always appear on that side of the sac which is towards the exterior. The sex of 

 the larger specimen was not determined, and I am unable to give any particulars as to 

 the arrangement of the gonads in the male. 



The gut (PI. I, tig. n. Int.) is simple and spacious, and its wall is not folded. 



The probo.scis is feebly developed, and its sheath is thin-walled, and not abundantly 

 provided with muscles. 



With such .scanty material available, nothing further can be said at present of the 

 anatomy of this species. Its chief interest lies in the fact that it is the only member 

 of the genus as yet recorded from truly Antarctic waters, unless we accept KiqiitJin 

 punmttl as a " good " species. I shall further state my views with regard to this 

 question under the heading of Liiii'iis i-ornu/dfns ; but I may be permitted to remark- 

 here that I can see no reason for referring that form to the genus J'Jii/ki/ki (or 

 Baseodiscus). If this view be correct, the present species will be the only one, I 

 believe, hitherto rei-orded from a latitude further south than 42°. 



5. />^^v('(/(('/^v7^v iiiiiriHi (Ilubr.) 



Eupolia ,/!ardli [M'lutosh (in lilt.)], Hubreclit, 1887, i.|i. ll-l.S: PI. I, %s. 7-9; PI. V; 

 PI. VI, figs. 4-11 : PL VII, figs. 4, -5, 8 ; PL X, fig. ('> ; PL XI, fig. li'. 



Station 91 : 300 fathoms. 



A single specimen taken near Three Kings Islands, New Zealand, a})pears to 

 belong, in all probability, to this species. It measures about (> cm. in length, and lias 

 a thickness of 6 mm. The head-end tapers somewhat, and shows a fixint surrounding 

 groove, as described and figured by Hubreclit. The tail is coiiically pointed, and 

 thicker than the head. 



The specimen is a female. 



No traces of cohjur can now be made out. 



U 



