AMBERLEYA. 281 
AMBERLEYA ORNATA, var. horrida. Plate XXII, fig. 2. 
Description : 
Length é : . 30mm. 
Length of body- spliorl to total eight : 2 OonelOU: 
Spiral angle : ; : <0. 
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 Murchisonx-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. Turso esmuatvs, Lyc. Quart. Journ. Geol. Soc., vol. ix, p. 342, pl. xiv, 
fig. 7. 
Bibliography, S§c.—lLycett, 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 carine is practically the same. 
Description : 
Length . : . 10mm. 
Length of bedswharl to total heiens : . 40: 100. 
Spiral angle : . 44°, 
** Shell ovately turbinated, spire aloied: whorls (5) turrited, convex, biangu- 
lated, and ornamented with three tuberculated carinz, 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 carine; the aperture is ovate.” 
Relations and Distribution.—This is a micromorph of Amberleya ornata, which 
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