﻿AMBERLEYA. 



277 



Littorina Phillipsii, Mor. and Lyc. 



— sulcata, Heb. and Desl. 



— Weldonis, sp. n. 



— cedilis, Mimst. 



— Dorsetensis, sp. n., A. ) CEdilis-group 



— — — B. 



— {? Trochus) pisolitica, sp. n. 



— (? Trochus) recteplanata, Tawney. 



— (? Trochus) triarmata, Heb. and Desl. 



Amberleya, Morris and Lycett, 1851. 



Shell turbinate, more rarely trochoid, rather thin, imperforate or nearly so ; sub- 

 elongate, frequently turrited, sutured space wide ; ornamented with spiral bands, 

 usually spinulose or nodular, some of which are prominent (Eucyclus). The 

 interspaces are finely striated, the strix being slightly oblique to the axis ; sometimes 

 these fine lines are strong enough to represent fine axial ribs. Base rounded, 

 spirally ribbed, and marked by fine radial strise. 



Aperture suboval, but varying according to age. In the early stage the columellar 

 lip is nearly straight, and produced anteriorly so as to be almost reflexed at the 

 extremity {like Purpurina). In the adult the aperture is more or less rounded, so as 

 to become suboval or subcircular ; there is usually a considerable deposit of callus : 

 outer Up thin and often crenulate. 



208. Amberleya capitanea, Munster, 1844. Plate XXI, fig. 12. 



1844. Tueb© capitaneus, Miinst. Goldf., Petref., pi. exciv, fig. 1. 

 1852. — — — D'Orb., Terr. Jur., vol. ii, p. 341, pi. cccxxix, 



figs. 7, 8. 



1863. Ambeeleya capitanea (?), Ooldf. Lycett, Suppl., p. 95, pi. xli, fig. 1. 

 1884<. — — — Beeby Thompson, Upper Lias of 



Northants, p. 309, pi., fig. 3. 

 Non Tubbo oapitaneus, Miinst. Morris and Lycett, Great Oolite Moll., 



pt. 1, p. 65, pi. ix, fig. 33. 



Bibliography, fyc. — The type is stated to be from the Inferior Oolite near 

 Grotz. D'Orbigny says that the species occurs everywhere along with Turbo 

 subduplicatus in the Toarcian. No locality in Calvados is quoted by him. The 

 form from the Great Oolite, doubtingly referred by Morris and Lycett to Minister's 



