48 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Jan. 20, 



2. Trichotropis fimbriata', Jefifreys. (Plate V. figs. 7, 7a.) 



Shell oblong, thin, senaitransparent, nearly lustreless : sculpture, 

 several rows or ridges of fine spiral striae, which are covered by short 

 and close-set bristles of the epidermis ; there are from eight to ten 

 of these rows on the body-whorl, two on tlie next, and one on each 

 of the two succeeding whorls ; the interstices of these rows as well 

 as the rest of the shell marked lengthwise by very slight and micro- 

 scopic lines : colour \ ellowish-brown : spire elongated, bluntly 

 crested at the top: whorls 4-5, convex, somewhat turreted, 

 regularly increasing i:i growth ; the last equals one half of the spire 

 when the mouth is placed downwards ; the apical whorl is com- 

 pressed and sligl'.tly inlorted : suture deep : mouth triangularly oval, 

 about two fifths the length of the spire : outer lip curved, thin- 

 edged, angular and inflected above, expanded at the base, but not 

 notched : inner Up filmy : pillar almost straight : umbilicus none. 

 L. 0-1, B. 0075. 



'Porcupine' Exp. 1869' St. 16. A single specimen. 



3. Trichotropis densistriata^, Jeffreys. (Plate V. figs. 8, 8 a.) 



Shell oval, thin, semitransparent, and nearly lustreless : sculp- 

 ture, numerous rows of exceedingly fine spiral strise, which are 

 covered by minute and close-set prickles; there aie from 20 to 2.5 

 of these rows on the body-whorl, and from eight to ten on 

 the penultimate whorl : colour pale yellowish-brown : spire short, 

 blunt at the top : whorls 3-4, rather tumid ; the last equals two 

 thirds of the shell with the mouth downwards, or placed in a prone 

 position ; the apical whorl is irregular : suture well marked but not 

 deep : mouth exactly oval, about half the length of the spire : outer 

 lip rounded, thin, angulated above, notched below : inner lip 

 thickened : pillar curved, abruptly terminating in a sharp point at 

 the base, below which is formed the basal uotch : umbilicus none. 

 L. 0-085, B. 0065. 



'Porcupine' Exp. 1869 : St. 16, 23 a. A single specimen from 

 eacli station. 



Distribution. C. Yerd I. ('Talisman' Exp.); 1192 fms. 



This minute species seems from the notched base to connect 

 Triehotropjis with Admete. 



I. Cancellaria viridula, Fabricius. 



Tritonium viridulum, Fabr. Fn. Gr. p. 402. 



Admete viridula, G. O. Sars, Moll. reg. arct. Norv. p. 21.5, t. 13. 

 f. 1 a, b, 2. 



'Lightniiig' Exp.: St, 1, 3. 



* Porcupine ' Exp. 1869 : 61, 65. 18/0 : Atl. 1, 2. 



Distribution. Arctic seas iu the Atlantic and Pacific, Iceland, 

 Norway, C. Cod northwards, and North Japan ; 2—1255 fms. 



Fossil. Pliocene : English and Belgian Crags, Iceland. Post- 



' Fringed. ^ Closely striated. 



