200 Transactions. 
cords about 8 in number, spiral groove first below suture is generally 
stronger than the others, giving suture a bordered appearance; aperture | 
rhomboidal, angled above, produced below into short wide canal, lightly — 
notched at end; outer lip straight, sharp, thickened within. with a few —' 
obsolete teeth; columella short and straight, with low oblique fold at E 
junction with canal ; inner lip smooth, with thin layer of callus endingin - 
acute angle half-way down canal. E 
Holotype in the Canterbury Museum. 
Height, 10-5 mm ; diameter, 4-5 mm. 
Locality—Petane, clays below limestone. E. 
Remarks.—This shell is not uncommon in the Petane clays, but was —— 
not separated by Hutton from A. pisaniopsis; the holotype was, indeed, — 
among his syntypes of that species. 4. speighti is easily separated from — 
A. pisaniopsis and A. cancellaria by its stouter form, flat whorls, bordered 
suture, stronger axials especially on the body, and spiral grooves appearing - 
only in the rib-interstices on the spire-whorls. Figures of the holotypes of 
A. pisaniopsis and A. cancellaria are given for comparison. (See Plate 17, 
figs. 3 and 20.) 
Alcithoe lutea n. sp. (Plate 17, fig. 17.) 
Shell large, ovato-fusiform ; spire conie, two-thirds height of aperture ; 
whorls 6, subangled about middle on spire, body-whorl with strong tuber- — 
culate keel, contracting very slowly to well-marked basal fasciole ; protoconch — 
bulbous, of about 24 smooth volutions; sculpture—the early whorls have _ 
about 14 obsolete ribs slightly stronger at shoulder-angle, on penultimate 
and body-whorls these form strong rounded tubercles, about 7 on latter, — 
there is no spiral sculpture ; aperture high triangular, channelled above, 
brogdly and deeply notched below; outer lip thickened, reflexed, ascending — 
nultimate whorl, smooth within; columella inclined, with four strong А 
oblique folds and sometimes a fifth weak posterior опе; inner lip calloused, 
widely spread over base and canal. 
olotype in collection of the New Zealand Geological Survey. 
Height, 92 mm. ; diameter, 38 mm. 
Locality.—Blue sandy clays, Okauawa Creek, Ngaruroro River. t 
Remarks.—This species is closely related to and is probably the direct 
ancestor of Alcithoe arabica, from which it is readily distinguished by 
its relatively much higher spire (two-thirds instead of one-half aperture), 
which gives the shell a different shape. There are also fewer and stronger 
tubercles on A. lutea, and the columella has generally 4, rarely 5, folds. 
А. arabica has generally 5, and often 6 or 7. Alcithoe, of which the genotype — 
is A. arabica, was treated as a subgenus of Fulgoraria by Suter, following — 
Cossmann ; but since the protoconch of the former genus is not laterally 
toiled, as it is in the latter, Alcithoe should take generic rank, and replace 
Fulgoraria in New Zealand lists. 
Ancilla (Baryspira) opima n. sp. (Plate 17, fig. 15.) 
hell small, strong, ovate; spire short and broad, with sharp apex; 
protoconch small, almost free from enamel; sculpture, spire, and upper 
