NEMERTINEA BAYLIS. 



I i.i 



my opinion. t<> the same species. Combining, therefore, all these records, we have 



the following:- 



These localities lie in a fairly complete circle, between the approximate latitudes 

 of .")()" S. and 77 S., and it appears that we are dealing 1 with a single common species 

 which extends completely round the subantarctic region. It is, perhaps, somewhat 

 remarkable that the species, occurring as near as South Georgia, should not have been 

 recorded from the Strait of Magellan, which lies well within its range of latitude ; and 

 possibly sooner or later it will be found there. Its northern range, however, with the 

 exception of Kerguelen and Heard Island, appears to lie within the extreme limits of 

 the pack-ice. 



. 



xi-offi. sp. n. (PI. II, figs !-(!.) 



Skin smooth. Head blunt and rounded. Mouth rather short. A transverse groove encircling the 

 head behind the cephalic slits. The latter are deep, and communicate with the brain only at their hinder 

 ends. Primary basement-membrane of cutis lacking. Glandular cells in epithelium with a brownish 

 secretion. Outer longitudinal muscle-layer very dense and thick. Proboscis with four longitudinal 

 iirr\es. Us circular muscle-fibres form dorsal and ventral crosses. Cerebral organs large, projecting into 

 lateral head-sinuses. 



Length up to 10 '7 cm. (probably often greater). 



Stations -_>i'0. '-"J4. :!14. :!lii. :',:U. 338, 339, 340, 355 : 4.") :'-oo fathoms. 



The species seems to occur together with /,. i-nri'iii/nfa* in nearly every case. 



A number of specimens of tins /,///, n*. which is clearly distinct from L. cwruyatus, 

 occur in the collection. I have named this species in honour ol the lamented 

 Commander of the Expedition. The two forms, when in spirit, are generally readily 

 separated by mere external inspection, though by this means some specimens of 

 /,. xnitti mi'_dit easily be taken for immature individuals of L. r<i/-n/i/<ifn* which had 

 become decolorised. 



