452 EEV. R. BOOG WATSON ON THE 



responding to the sinus of the outer lip. The body is rather 

 small, cylindrical, protracted into a strong, rounded, abruptly trun- 

 cate snout, which is probably long when not contracted by the 

 spirit. On either side of the snout, and rather below the middle 

 of its horizontal line, project the tentacles, which are short, cylin- 

 drical, and blunt, and have no eyes at any part, either of their base 

 or on their length. The foot is large, being broad and flat, but 

 not high ; in front it is broad and square, with projecting rounded 

 corners ; behind it is long and pointed. There is no branchial 

 plume ; but on the under surface of the mantle is a strong cen- 

 tral line with long pectinated fringes extending from it on either 

 side. The cloacal duct does not open in the body, but runs out 

 on the right side in the mantle to a large, longish, thickened 

 nipple, which corresponds with the sinus of the shell. This duct 

 was full of hard oval green pellets. Mr. John Murray, F.R.S.E., 

 kindly examined these for me, and writes : — " In the little pellets I 

 find Coccoliths, small Globigerinas, Pulvinularias and their broken 

 fragments, Diatoms, Polycistincs, Challeiigerias, fragments of a 

 Crustacean, and setae of an Annelid." Operculum none. 



Shell. — Very short and broad, biconical, subscalar, angulated, 

 very thin, obsoletely ribbed, with spiral threads, and having a 

 longish, lop-sided, small-pointed snout. Sculpture. Longitudi- 

 nals — on the penultimate whorl there are about 20 short, scarcely 

 oblique, small, rounded, little prominent ribs, with shallow rounded 

 furrows between of a like breadth ; they only occupy the lower 

 half of the whorls, extending to the inferior suture, but not at all 

 to the shoulder ; they diminish rapidly in number up the spire. 

 On the body-whorl they appear only as oblique and slightly elon- 

 gated tubercles, which coincide entirely in direction with the lines 

 of growth. These are fine, close-set, and hair-like : below ? the 

 suture they are straight and irregular, forming on the upper 

 whorls infrasutural crenulations ; on the body-whorl they rise 

 into slight undulations in prolongation of the ribs, and these con- 

 tinue to the point of the snout. Spirals — there is a blunt angu- 

 lation about the middle of the whorls ; and here the longitudinal 

 ribs take their rise. The whole surface of the shell is covered 

 with rounded threads and furrows : on the shoulder of the whorls 

 these are rather obsolete ; on the angle among the tubercles they 

 are strong, but rather crowded ; but from this downwards they 

 are very distinct and regular, with a few finer ones interspersed, 

 becoming a little crowded on the snout, and then sparse and 



