﻿AMBERLEYA. 



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Amberleya ornata, var. horrida. Plate XXII, fig. 2. 



Description : 



Length . . . . .30 mm. 



Length of body-whorl to total height . . 52 : 100. 



Spiral angle .... 56°. 



Shell eucycloid, turrited. Whorls about six, angular, and increasing 

 suddenly ; suture wide. The ornaments are very coarse, consisting of three 

 nearly equal spiral belts, rugosely crenulated, the upper one at some distance 

 from the suture ; cross-hatchings coarse and wide apart. Body-whorl ventricose 

 in most cases, rather exceeding half the height of the shell ; base with five spirals, 

 moderately crenulate. Aperture as in other varieties of Amberleya ornata. 



Relations and Distribution. — This form differs from other varieties of Amb. 

 ornata, already described in the position and development of the posterior spiral 

 belt, in having fewer whorls, and in the rugoseness of the ornamentation. 



It occurs in the Murchisonse-zone of Bradford Abbas, and is thus intermediate 

 in time between Amb. capitanea and Amb. ornata, var. abbas. 



210. Amberleya gemmata, Lycett, 1853. Plate XXIII, fig. 19. 



1853. Turbo gemmattts, Lye. Quart. Journ. Geol. Soc, vol. ix, p. 342, pi. xiv, 



fig. 7. 



Bibliography, fyc. — Lycett, in describing this species from the Lincolnshire 

 Limestone of Ponton, points out in what respect it differs from " Turbo" capita- 

 neus. I also agree with him that it is more slender than " Turbo " ornatus, Sow. ; 

 but the arrangement of the carinas is practically the same. 



Description : 



Length . . . . .10 mm. 



Length of body- whorl to total height . . 40 : 100. 



Spiral angle .... 44°. 



" Shell ovately turbinated, spire elevated, whorls (5) turrited, convex, biangu- 

 lated,~iand ornamented with three tuberculated carinas, of which the first carina is 

 the smallest ; the last whorl is large and ventricose ; its base is convex and 

 encircled with numerous small serrated carinas ; the aperture is ovate." 



Relations and Distribution. — This is a micromorph of Amberleya ornata, which 



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