W. H. Hudleston—The Yorkshire Oolite. 5at 
A very distinctive feature consists in a prominent double varix on 
each whorl, which is rather less tuberculated than the other coste 
(possibly from the effects of wear). On the penultimate whorl are 
seven cost in all. The highest row has the largest and best cut 
tuberculations, the second and seventh are the faintest, the fifth and 
sixth form the prominence. The same number and arrangement are 
observed on the posterior portion of the last whorl, the base of 
which has ten rows of fine granulations nearly equal in strength, 
and curving round the columellar area towards the anterior ex- 
tremity. Shell substance thin. Aperture wide and generally 
roundish, coming to a blunt point posteriorly. But little callosity 
on the columella, which is short and hollowed out. 
Relations and Distribution —Although this handsome species has 
affinities with the group previously described, by far its nearest rela- 
tion is Amberleya armigera, Lycett (Suppl. to Great Ool. Moll. p. 20, 
pl. 31, fig. 6), a fossil of the Yorkshire Cornbrash. The general 
outline of these two species is almost identical, but the Corallian 
shell is more highly ornamented, and the costz in the base of the 
body-whorl are finer and more numerous. It may justly be regarded 
as the representative of the Cornbrash species on a higher horizon. 
The shell in question is very rare, but Sir Charles Strickland has 
found a few of them, chiefly in the Coral Rag of the Scarborough 
district (Seamer, Ayton, Brompton). No specific name could be 
more appropriate than that of its discoverer. 
It should be observed that imperfect specimens resembling 
“Turbo” Buvignieri, D’Orb. (Terr. Jurass. vol. ii. p. 256, figs. 6-8) 
have been found in the Coral Rag of Ayton. 
35.—AMBERLEYA PRINCEPS, Roemer, 1836. Plate XVII. Fig. 11. 
Turbo princeps, Roemer, Ool. Geb. 1836, p. 153. pl. xi. fig. i. 
Idem, D’Orb., 1850, Terr. Jurass, vol. i. p. 357, pl. 335, figs. 9, 10. 
Bibliography, etc.—This species is so well marked that authors 
have had little difficulty in recognizing Roemer’s figure and diagnosis. 
Description.—Specimen from the Coral Rag of Hildenley (Strick- 
land Collection). 
1 fea) RO EOP RIA Als Hina OC he CIERE EI ReIe Ge era 61 millimétres, 
SWildtiliensos pre reereaie Sears atcmraetes eine vleisratstess «6 32 PA 
Spiralh anol Omer tae loneerardeyet o tctantieile’shs 56°. 
Shell oval oblong, not umbilicated. Spire composed of about five 
very convex whorls, separated by wide sutures. The ornaments in 
the specimen are a little indistinct, the salience of the ribs being 
very much reduced. The fine oblique striation between the ribs is 
not visible. A pair of more prominent ribs is noticeable in the 
anterior portion of each whorl. Shell substance very thin, The 
outer lip is straight and protracted, turning suddenly towards the 
anterior margin, which is squarish: columella much excavated. 
Aperture large in every direction. 
Relations and Distribution—D’Orbigny’s figure represents a more 
oval mouth, but there can be very little doubt as to the identification. 
The ancestors of this handsome species must, I suppose, be sought 
