Trophon.} GASTROPODA. 417 



14. Trophon waipipicola, Webster, 1906. Plate 19, tig. 8. 



Trophon waipipicola, Webster, T.N.Z.I., xxxviii, 1905 (1906), 310, pi. 30, f. 3. 



Shell small, fusiform, turreted, with noduled keels, grey. Sculp- 

 ture : A noduled keel on the second and third whorl, a second row 

 appearing on the fourth and fifth in the suture ; the body-whorl has 

 3 keels, the middle one being the smallest ; the nodules are lengthened 

 in a spiral direction, and are situated on axial buttresses, which are 

 faint towards the suture and the base ; there are no spiral striae 

 between the keels ; on the base are 4 spirals, the lowest being the 

 strongest ; fasciole distinct, lamellate. Colour grey, columella brown. 

 Spire elevated conical, tabulated, of about the same height as the 

 aperture with canal. Protoconch small, of 1| smooth whorls, the last 

 half angled. Whorls 7, first slowly then more rapidly increasing, 

 broadly shouldered and keeled, outlines straight ; base very little 

 contracted above the canal. Suture not much impressed. Aperture 

 subvertical, oval, rounded above, produced below into a short straight 

 and open canal. Outer lip sharp, angled by the keels, smooth inside. 

 Columella smooth, slightly concave. Inner lip narrow', spreading 

 over the lightly excavated parietal wall, drawn out to a fine ridge 

 below. Operculum with the nucleus apical. 



Diameter, 5 mm. ; height, 10 mm. (type). 



Dentition (Webster, i.e., 310, pi. 39, f. 36). Central tooth with 

 5 cusps, the central and the outer ones much larger than the inter- 

 mediate two. Laterals arcuate, unicuspidate. 



Type in the collection of Mr. W. H. \Vebster. 



Hob. Waipipi. Manukau Harbour, on mud-flat (type). 



Subgen. 4. TROPHONOPSIS, Bucq., Dollf.. Dautzenb.. 1882. 



Trophonopsis, Bucq., Dollf., Dautzenb.. Moll. Mar. Roussillon, i, 40. Type : 

 Murex muricatus, Mont. 



Shell small, elongated fusiform ; protoconch smooth, polygyrate ; 

 whorls convex or angular, with numerous varices, crossed by spiral 

 cords, the points of intersection produced into spiny scales ; fasciole 

 not prominent, no umbilical chink ; outer lip strongly crenulate ; 

 canal moderately long, much twisted. Operculum with a nearly 



apical nucleus. 



KEY TO SPECIES. 



A. Shell of 5 whorls more than 10 mm. high ; 18 sharp axial ribs 



and 13 spiral cords on the body-whorl . . . . . . Bonneti. 



B. Shell of 5 whorls less than 10 mm. high. 



a. Numerous sharp, mostly crispate, axial riblets, and 5 spiral 



cords on the body-whorl . . . . . . . . crispulattu. 



aa. 11 rounded axial riblets, and 10 spiral cords on the body- 



whorl . . . . . . . . . . . . fm 



15. Trophon Bonneti, Cossmann, 1903. Plate 45. fig. 23. 



Trophon (Trophonopsis) Bonneti, Cossm., Ess. Pal. Cornp., v, 1903, 200, 

 pi. 3, f. 7. T. Stangeri, Gray : Button. Plioc. M., 38 ; not of Gray. 

 T. ambiguus puinila, Suter, J. Mai., vii, 1899, 55- Index, 72. 



14-Moll. N.Z. 



