6 Herman Friele, 



widely spread over the pillar, and ridged along the edge; columelle 

 sigma-shaped ; canal very short and much expanded. Shell strong, 

 white, with a thin, yellowish, hispid epidermis ; aperture and inner 

 lip are coated with a beautiful white enamel ; structure consists 

 of not much raised spiral-ribs and numerous more or less distinct 

 lines of growth, producing on the top-whorls alone, a regular 

 decussation. Size: L. 62. B. 20. mouth incl. canal 32 and the 

 greatest diameter of the latter 15 mm . 



Its nearest ally is Fusus Sarsi Jeff., but differs from it in 

 having a much wider canal, and in the lip being regularly rounded 

 to the basis. In F. Sarsi the lip is contracted at the canal. 

 The structure in F. ebur is comparatively more delicate, and it 

 exceeds F. Sarsi conciderably in size so as to make the propor- 

 tion between them like that of F. islandicus and pygmæus. 



F. Moe bi Dun eker & Metzger is by Dr. Jeffreys supposed 

 to be F Sarsi, but this must certainly be an error. I dredged 

 a living specimen of an authentic F. Sarsi Jeff, a few years ago» 

 and in comparing the teeth with those illustrated by Duncker 

 & Metzger (D. Exp. zur Unters, d. Nordsee fig. 1.) , the 

 difference between them appeared sogreat, that I concluded they 

 could not possibly belong to the same species, but after having 

 seen the F. ebur of Mørch, I became perfectly satisfied in referring 

 F.MoebiD&M to this, as the external characters — the 

 size, the expanded canal without a contraction of the lip — corre- 

 spond exactly. 



Fig. 11 & ll a teeth and operculum of Fusus Sarsi Jeff 



Fig. 12 teeth of F. Moebi; copy of Duncker & Metzger. 



Fusus lachesis Mørch — „Journ. de Conch." 1869 pg. 398. 

 „ terebralis M. Sars. 



Hab: cold area St. 18 400 f. 



Operculum elongated earshape, nucleus in the lower corner, 

 distorted. Fig. 13a. 



Radula has more than 100 joints. Fig. 13 two joints. 



Fusus Mohni n. sp. 



Form oval fusiform; whorls 6£, tumid, and connected with 

 a deep suture; mouth piriform; outer lip sharp and contracted at 

 the canal; inner lip forms a thin widely diffused glaze on the 

 pillar; columelle only slightly bent; canal moderatly long and 

 straight. Shell white, almost transparent, with a membranous 

 delicate hispid epidermis; structure, elevated spiral-ribs crossed 





