310 Transactions. 



grooved behind the succeeding whorl. Base with seven or 

 eight spirals separated by furrows of the same width, colora- 

 tion as above. False umbilicus deep, funnel-shaped, contracted 

 at the margin by a spiral rib with occasional tubercles ; colu- 

 mella arcuated, having a blunt tubercle on the funnel side, 

 and a long fold transversely wound over the anterior end and 

 passing into the shell. In my figure 2a the white extension 

 near the body-whorl represents the spread of the columella 

 at the point of junction. Aperture with numerous irregular 

 denticles, some of them extending far into the shell. Height, 

 5 mm.; major diameter, 7*5 mm. 



Hah. Takapuna, in shell sand. 



Mr. C. Hedley, to whom I sent this shell as T. ringens, is 

 good enough to reply, "... too remote from that species 

 to be worth comparing . . . Your shell has a close re- 

 semblance to the Victorian C. pleheiusP I believe that the 

 transverse fold on the columella, and the absence of a biplicate 

 tooth at that point, separates this shell from C. plebeius, and 

 also from C. variegatus, Ad., recorded by the late Professor 

 Hutton (see Man. N.Z. Mollusca, 1880, p. 95). 



Trophon waipipicola, n. sp. Figs. 3, 3a, 3&. 



Shell fusiform, grey, with seven whorls, of which one and 

 a half form the protoconch, which is smooth, with a smooth 

 keel on the last half-whorl. Sculpture : A noduled keel on the 

 second and third whorls, a second row appearing on the fourth 

 and fifth in the suture ; the body-whorl has three keels, the 

 middle one being the smallest ; the nodules are lengthened in 

 a spiral direction, and are situated on longitudinal buttresses 

 which are faint towards the suture and the base. There are 

 no spiral striae between the keels, such as one finds in Siphon- 

 alia dilatata, of which the shell is otherwise a miniature ; the 

 tabulation below the suture is plain ; on the base are four 

 spirals, the lowest being the strongest. The canal is straight and 

 open, the extremity projecting beyond the pillar, on which are 

 a few transverse folds. Columella smooth, brown, arcuated and 

 slightly concave. The horny operculum has the nucleus apical, 

 and a projection on the inner side as in Siphonalia ; the attach- 

 ment scar is auriform. Dentition : Five cusps on straight 

 plates narrowed anteriorly, the centre and two outside cusps 

 being the largest ; there is a reversely arched strengthening- 

 ridge on each plate, and a similar small one above it ; the 

 laterals are bicuspid, webbed up to the points. There are 

 three slight folds on the outer edge of the canal. Height, 

 1 cm. ; major diameter, 5 mm. 



