244 REV. R. B. WA.TSON ON THE 



Gen. Trophon, Montfort. 



12. Trophon Lowei, n. sp. 



Shell strong, biconical, with a straight-sided spire and a very 

 small glassy turbinated, tip ; the snout is shortish but small. 

 Sculpture — Longitudinals : there are 7 strong, rounded, slightly 

 shouldered ribs which run continuously down the spire ; they 

 rather tend to multiply towards the tip, where they pass into 

 being round tubercles ; they are parted by slightly narrower, 

 shallow, rounded and open furrows ; these, as well as the ribs, 

 are closely scored with small superficial harsh lines. Spirals : 

 there are on the body-whorl 12 to 15 narrow, slightly raised 

 threads, roughened but not squamated by the crossing of the 

 longitudinal threads ; they are chestnut-tinted, with flattened 

 interspaces of about twice their breadth ; in each of these lie 

 more or less distinct smaller threads which are occasionally 

 double ; a fine rounded thread encircles the top of each embryonic 

 whorl, but tends to die out in the later whorls. Colour yellowish 

 grey, with chestnut tint on the spirals. Spire straight-sided, 

 conical, slightly higher than its breadth above the body-whorl ; 

 in its upper part slightly scalar ; the tip is sharp, very small and 

 prominent, and consists of the 4-whorled glassy turbinated 

 embryo-shell. Whorls 7 besides those of the embryo-shell ; 

 they are slightly shouldered below the suture, between which 

 shoulder and the suture they are slightly hunchy ; the last is 

 rather small and slightly flattened. Suture not sunken, linear, 

 undulated. Mouth small, narrow, oval, pointed at both ends, not 

 expanded, exactly half of the shell in length. Canal rather 

 narrow, short, turned back and to the left behind the pillar. 

 Outer lip very slightly curved, not patulous, with a thin but strong 

 straight edge, strengthened externally by a strong varix-like, 

 somewhat remote rib, and internally by a strongish pad on which 

 project G stumpy, somewhat elongated teeth. Inner lip flat, sub- 

 patulous, extremely thin, but with a very slight straight edge, 

 which becomes a little stronger towards the point of the pillar ; 

 there a very small furrow appears behind the lip just where it 

 takes a slight twist ; at its upper end, just before it is joined by 

 the outer lip, a feeble tubercle occurs, helping to define an 

 indistinct gutter-like sinus, which does not cut the outer lip-edge. 

 Operculum small, narrow, slightly curved, ruddy chocolate in 

 colour; the apex is small and lies, when extruded, towards the 



