XK.M ERTIXEA BAYLIS. I L> I 



bundles of fibres belonging to this layer arc somewhat .scattered, and are embedded 

 in a considerable amount of gelatinous and solid-looking connective tissue. 



The circular muscle-layer (C.M.)is thin. Between it and the outer longitudinal 

 muscles lie the large lat eral ncr\ e si cms ( LN. ). 



The inner layer of longitudinal muscles (L.M 1 .) is comparativelv thick and dense. 

 Beneath it lie the proboscis-sheath (I'.S.). the gut, and a certain amount of loose 

 connective tissue. In this connective tissue, between the muscles and the nut. there 

 are numerous large spaces, some of which are probably Mood-sinuses, hut others appear 

 to he the gonadial sacs. The former are situated dorsal I v and ventrallv. the latter at 

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

 empty. Inn more posteriorly o\a are beginning to lie 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 1 am unable to give aiiv particulars as to 

 the arrangement of the nonads in the male. 



The gut ( IM. 1, tig. (I, Int.) is simple and spacious, and its wall is not folded. 



The proboscis is feelilv 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 ver recorded from truly Antarctic waters, unless we accept l\n^,'li,i 

 /iiniiit'tti as a " good " species. I shall further state my views with regard to this 

 question under the heading of l/nii'iix r,>rrii</<itiix but 1 mav be permitted to remark 

 here that I can see no reason for referring that form to the genus Eii/xil'm (or 

 //r.-.v, IK//.V--//X). If this view be correct, the present species will be the only one. 1 

 believe, hitherto recorded from a latitude further south than 4i' . 



5. Baseodiscus giardii (Hubr.) 



Knj.,,1!,, ,/;,/i;Ui [M'Tnttish (in lift.)], Hubrurht, 1SS7, |']>. 11 l:i: PI. 1, figs. 7-9; PI. \' : 

 PI. VI, figs, t-11 ; PI. VII, figs. 4, 5, s ; PL X, fig. G ; PI. XI, fig. !:>." 



Station '.)] : :',()0 fathoms. 



A single specimen taken near Three Kings Islands, New Zealand, appears to 

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

 a thickness of (i mm. The head-end tapers somewhat, and shows a faint surrounding 

 groove, as described and figured bv Huhrecht. The tail is conically pointed, and 

 thicker than the head. 



The specimen is a female. 



Xo traces of colour can now be made out. 



