414 REV. R. BOOG WATSON" ON THE 



last whorl, and fifteen on each of the earlier whorls. The surface 

 is scored with hair-like lines of growth, of which every here and 

 there, and especially on the base in the continuation of the riblets, 

 one is stronger than the rest. Spirals — the carination at the 

 shoulder is made more prominent by the sharp line of tubercles. 

 The whole surface is covered with flatly rounded threads, which 

 are roughened by the incremental lines : these threads are 

 strongest on the snout, feeble on the body, and very faint in the 

 sinus-area. Colour whitish imder a yellowish epidermis, which is 

 a rough but thin and persistent membrane. Spire high, scalar, 

 conical. Apex eroded, but evidently small. Whorls 10 (?), of 

 rather rapid increase, high, angulated, with a long, rather high, and 

 scarcely concave shoulder, and with a straight slight contraction 

 to the lower suture ; the last is very large in proportion to the 

 rest, being long and somewhat tumid, and ends in an elongated, 

 broad, unequal-sided snout. Suture very slight indeed ; for though 

 it is defined by the contraction of the whorls above and below, 

 yet the inferior whorl laps up on the one above it so as almost 

 to efface the junction-angle. Mouth pale buff-coloured within, 

 long and narrow, angulated above, also at the keel, and also, 

 very slightly, at the junction of the pillar and the body. Outer lip : 

 from the body to the keel it is slightly concave and contracted ; 

 from the keel it curves very regularly to the point. On leaving 

 the body the line of the edge runs quite straight forward for a 

 short distance, and then curves round to the right, running out 

 on the line of the ribs into a high shouldered prominent wing, 

 between which and the body -whorl the broad, deep, and rounded 

 sinus lies : towards the front of the mouth it retreats rapidly to 

 the point of the snout. Inner lip spreads rather broadly on 

 the body, is a little thickened, and has a very slightly raised 

 edge. The pillar is long, straight, narrow, and has in front a 

 slightly twisted edge, but is not truncated. H. 175. B. 0*75. 

 Penultimate whorl, height 03. Mouth, height 0*96, breadth 

 0-47. 



It is unfortunate that this very interesting species is repre- 

 sented by only two dead and somewhat broken shells. 



Dr. H. "Woodward, who kindly examined this species for me, 

 says it is near P. roslrata, Solander. That species is figured by 

 Edwards in the 'Eocene Mollusca,' published by the Palasont. Soc, 

 p. 218, xxvi. 8. Compared with that figure, this is much stum- 

 pier, more scaler, more sharply keeled, and the spiral sculpture 



