Marwick.—Pliocene Mollusca from Hawke's Bay. 197 
Aethocola taitae n. sp. (Plate 17, fig. 16.) 
little they surmount the are never as strong as the rst 2 
conch-volutions convex, but from then onwards the shell is strongly 
shouldered with ut 12 strong ribs with wider interstices ; ribs are 
spiral, so early whorls have 2 threads on shoulder, a stronger one on angle, 
and another strong one midway to suture below, there are finer secondaries 
in the broad interspaces, on later whorls secondaries increase in number 
wards and deeply notched at base; outer lip thin and sharp, lirate within, 
antecurrent to suture ; columella smooth, slightly arcuate ; inner lip thin, 
not extending over base. 
Holotype in collection of the New Zealand Geological Survey. 
Height, 34 mm. ; diameter, 18-5 mm. 
Locality.—Blue clays below limestone, Kikowhero Creek, Ngaruroro 
River. 
as an ancestor. It differs from nodosa in having fewer and stronger ribs 
and tubercles, stronger spirals, and a flatter shoulder. Generic rank is 
here given to Aethocola, which Iredale (1915) set up as a subgenus of 
Verco i 
genus belongs to the Buccinidae, while Verconella, which is not notched, 
belongs to the Chrysodomidae. Named in honour of Mrs. G. Tait, of 
ho. 
Cominella hamiltoni (Hutton). (Plate 17, fig. 4.) 
1885. Clathurella hamiltoni Hutton, Trans. N.Z. Inst., vol. 17, p. 316, pl. 18, 
1893. Clathurella hamiltoni Hutton, Macleay Mem. Vol., p. 52, pl. 7, fig. 35. 
1915. Cominella huttoni Kobelt: Suter, N.Z. Geol. Surv. Pal. Bull. No. 3, p. 25 
(not of Kobelt). 
Shell small, broadly fusiform ; spire slightly higher than aperture with 
canal; whorls 6, with high narrow shoulder, level with suture, body-whorl 
comparatively large, contracting fairly rapidly to short neck which is marked 
by a prominent fasciole; protoconch a flat dome of 2 smooth whorls 
(= tectiform, or “ en goute de suif,” Cossmann, 1895, р. 12); sculpture— first 
conch-whorl with strong ribs curving forward on lower part of whorl, 
after first volution about 6 spiral threads appear, these surmount ribs and 
increase in number until there are about 12 on penultimate whorl with equal 
interstices, body-whorl with 20 of which anterior 8 are stronger than others, 
ribs number about 12 on spire-whorls and 15 on body, are very strong and, 
passing over narrow shoulder, reach suture above, but become weaker 
on base and then die out; suture undulating ; aperture oval, channelled 
