406 EEV. E. BOOG WATSON ON THE 



Sculpture. Longitudinals — there are no ribs. The lines of growth 

 are strong, hair-like, unequal, and close-set ; on the keel which 

 marks the line of the old sinuses they are exceptionally strong, 

 prominent, regular, and a little remote, as they also are at the 

 top of the whorls in the suture ; still they are throughout 

 rounded, not sharp. Spirals — the whorls are angulated about the 

 middle, and project in a rather narrow, prominent, rounded 

 keel, which is almost crenulated by the lines of growth. The 

 whole surface is also covered by small, broadish, rounded, close- 

 set spiral threads, which are somewhat granularly tubercled below 

 the keel. On the left side of the point of the snout they tend to 

 become obsolete, as they also do on the earlier regular whorls. 

 Colour porcellanous white. Epidermis : only one minute frag- 

 ment remains, which seems thin, yellowish, and membranaceous. 

 Spire high, subscalar, typically conical, the profile-lines being very 

 little interrupted by the carinal projection. Apex blunt, rounded, 

 consisting of two smooth globular whorls. Whorls 8, short, 

 broad, of regular increase, the last rather large ; they have a 

 sloping, slightly concave shoulder ; their profile below the keel 

 is straight and scarcely contracted. At the top of each whorl 

 there is a slight collar, which gives the effect of a very slight 

 canaliculation to the suture. The base of the shell is somewhat 

 swollen, and prolonged into the shortish, broad, and very unequal- 

 sided snout, which lies quite on one side of the base. Suture 

 strong and slightly canaliculated. Mouth large, almost rhomboi- 

 dally pear-shaped, sharply angled above, and with a broad open 

 canal below. Outer lip, very regularly curved throughout ; its edge, 

 which is thin and sharp throughout, retreats at once on leaving 

 the body, forming an open V-shaped sinus, which is rounded 

 at the angle; below this it sweeps downwards and very little 

 forwards, forming a very low-shouldered wing ; towards the lower 

 part of the mouth it curves very regularly backwards to the 

 point of the pillar. Inner lip, which is polished and porcella- 

 nous, is rather broadly excavated in the substance of the shell ; 

 it is scarcely convex on the body, very slightly concave at the 

 junction with the pillar, which is narrow and short, being very 

 obliquely truncate in front, with a fine, but strong, sharpish 

 twisted edge. H. T26. B. 0-52. Penultimate whorl, height 

 0-23. Mouth, height 0-6, breadth 0"34. 



I have marked the specimen from Station 169 with a query. It 

 is very much rubbed ; but the sculpture of the shell, and even of 



