A. E. Yerrill — Mollusca of the Nexo England Coast. 177 



eighteen living specimens; and sta. 2115, N. lat. 35° 49' 30", W. 

 long. 74° 34' 45", in 843 fath. (No. 35,583), forty living. It was 

 taken by Sars, off Lofoden, in 120 to 200 fath. 



T^NIOG-LOSSA. 



Benthodolium YerriU, gen. nov. 



Shell rather large, shape somewhat intermediate between Bncci- 

 mnn and Dolhan. Spire moderately elevated. Whorls convex, 

 last one ventricose. Aperture large, broad, somewhat semicircular, 

 ('anal very short, scarcely differentiated from the aperture, formed 

 chiefly by the eversion and turning np of the anterior end of the 

 colum^ella-margin. The coluraella-lip is thickened and sinuous, ex- 

 tending over the umbilical region. A distinct, w^ell defined layer of 

 enamel, on the body-Avhorl, connects the outer lip with the colu- 

 mella. No umbilicus. The operculum is large, moderately thick, 

 horny, ovate or subcordate, with a large, spiral nucleus, situated a 

 little within the margin of the broad anterior end, which is slightly 

 emarginate in the middle, opposite the nucleus. 



The animal, in alcohol, has a broad head, with large, stout, taper- 

 ing, acute tentacles, apparently without any trace of eyes. Pro- 

 boscis moderately long. The siphon is indicated only by a short 

 rounded fold of tlie mantle-edge. The foot is short and broad, 

 bhintly rounded behind, with a deep transverse groove in the front 

 margin. Gills very unequal in size, the lower only about half the 

 length of the u]^per. 



The odontophore, in the type-species, is small and short, with 

 teeth somewhat like those of Dolium. The rachidian tooth is broad, 

 Avith a large, shaj-p central cusp and six or more small denticles on 

 each side ; the inner lateral tooth is large, strongly curved, with a 

 sharp terminal cusp, and several small lateral denticles on the outer 

 margin; the tw^o outer rows are much alike; these teeth are long, 

 slender, curved, with sharp tips. On each side of .^jthe cavity of the 

 proboscis there is a chitinous patch, closely covered with small chiti- 

 nous scales or denticles, which are closely crowded together and im- 

 bricated ; the largest of these denticles are flattened and have their 

 free end lanceolate and acute. 



Benthodolium abySSOrum Verrill and Smith, sp. nov. 

 Plate XXXI, figubes 12, 12a, \1h. 

 Shell large, thin, stout, with inflated whorls, and a short, obtuse 

 spire. Whorls five, below the nucleus, rapidly increasing, evenly 



