418 GASTROPODA. [Pectinibranchia . 



Shell small, fusiform, rather thin, reticulated by axial and spiral 

 sculpture, whitish, turreted. Sculpture consisting of numerous narrow 

 and sharp varices, sometimes composed of a few crenate lamellae. 

 extending over the whole base ; they are crossed and reticulated 

 by subequidistant spiral cords, alternately si router and finer on the 

 bod}-- whorl ; there are often 1 or 2 fine spirals on the shoulder of 

 the whorls, 1 on the keel and 1 below it on the upper whorls, pen- 

 ultimate whorl with 2 strong and 2 fine cords below the shoulder, 

 body-whorl with about 13 cords ; the points of intersection some- 

 what nodulous and with raised scales ; fascicle present, lamellate, 

 not prominent. Colour white, aperture white. Spire elongated conic, 

 turreted, of the same height as the aperture with canal. Protoconch 

 with the nucleus small and smooth. Whorls 7, convex, distinctly 

 shouldered and carinated ; base much contracted above the canal. 

 Suture superficial. Aperture oval, subvertical, angled above, with a 

 moderately long and open canal, which is oblique and strongly re- 

 curved. Outer lip thin, crenulated by the spirals, grooved inside. 

 Columella vertical, lightly excavated. Inner lip narrow and thin, 

 spreading broadly over the somewhat arcuate parietal wall, narrowed 

 below to a narrow ridge. Operculuvi with the nucleus subapical. 



Diameter, 12mm. ; height, 25mm. (type, from the Pliocene). 



Dentition. Suter, J. Mai., vii. 56, pi. 1 f. 13. 



Type in Mr. Bonnet's collection, Paris. 



Hob. Stewart Island, in 15 fathoms. 



Remark. As Mr. Cossmann's diagnosis of the species was accom- 

 panied by a figure, I give preference to the name proposed by him for 

 this species. 



in the Pliocene. 



16. Trophon crispulatus, Suter, 1908. Plate 19, fig. 9. 



Trophon crispulatus, Suter, P. Mai. S., viii, 1008, 178, pi. 7, f. 2. 



Shell very small, fusiform, turreted, very thin, white, translucent, 

 reticulated by numerous axial crispate varices and a few spiral lira*. 

 Sculpture consisting of close fine and sharp varices, usually 20 to 25 

 on a whorl, but occasionally their number is reduced to about 15 ; 

 they are either straight or strongly crispate lamellae, retractive on the 

 shoulder, but vertical below it ; on the base they extend as fine stria> 

 upon the neck of the canal ; they are reticulated by distinct spiral 

 threads, sometimes, however, inconspicuous, the points of crossing 

 raised into sharp short spines ; the spire-whorls with 3 spirals, the 

 first carinating the shoulder ; body-whorl with 5 cinguli. the lower 

 part of the base without spirals ; the interstice between the. first and 

 second spiral is always broader than the succeeding ones : fascicle 

 minute, transversely striated. Colour white. Spire conical, turreted, 

 higher than the aperture with canal. Protoconch small, papillate, of 

 1 smooth and convex whorls, the globose nucleus slightly lateral. 

 Whorls 5, regularly increasing, shouldered and keeled ; base con- 



