W. H. Hudleston—The Yorkshire Oolite. 539 
Relations and Distribution—This form has a larger spiral angle 
than the two succeeding ones, and differs to a certain extent in the 
character of its ornaments. It occurs chiefly in the Lower Calcareous 
Grit, and never ascends into the Coral Rag. 
B.—Variety of Lrrrorina murtcata, probably the Turbo muri- 
catulus of Young and Bird. 
Description. Fig. 8a.—Specimen from the Coral Rag of Brompton 
(my Collection). 
MV CTNOEIN 5 atecelis: cease: hoalraye alch Suaveven grey avehey st aualet dh sca eke 10 millimétres. 
DU Hal ee hai tc ancabe'o slays side « Gataak wet genae eigits 8 "9 
Spiral angele, AVERT on cicisia «gues tow orgciuanes 62°. 
Shell rather longer than wide, oval, not umbilicated. Spire com- 
posed of about five whorls, which increase under an angle nearly 
regular, and without prominence. Suture rather close. Ornaments 
on the apical whorls (where visible) consist of three transverse 
coste, which are but slightly granulated ; these decussate with spiral 
costes very oblique to the axis. In the penultimate whorl the 
transverse coste are granulated, the granulations being very round 
and very regular, and a fourth row is partially developed: the 
spiral coste become finer and the intervening mesh is striated in the 
same direction. In the body-whorl there is no further trace of spiral 
coste, but the spaces between the rows of granulations are finely 
striated. These rows are five in number, the third and fourth being 
very slightly prominent: in the base of the whorl are about five 
lines of smaller granulations, making ten in all. The aperture is 
concealed in matrix. 
Fig. 8b.—Another specimen enlarged. 
Relations and Distribution — This pretty little shell rather re- 
minds one of a beehive. It represents the form of the genus 
which is most removed from Eucyclus. Very characteristic of the 
Coral Rag of Brompton and Ayton: less frequent in the Coral Rag 
of the Howardians. A somewhat similar form occurs in the Coral 
Rag of Wiltshire, but I never saw it in the Corallian of Weymouth. 
C.—Variety of Lirrorina muricata, inclining towards Lirro- 
RINA PULCHERRIMA, Dollfus, 18638. Plate XVII. Figs. 9a, 9b. 
- Littorina pulcherrima, Dollfus, 1863, Kim. du Cap de la Heve, p. 46, pl. vi. 
gs. 3-6. 
Bibliography, etc.—Dollfus’ shell has the following description. 
Length 380 mm., width 21 mm., spiral angle (convex) 50°. .Shell 
ovate-oblong, imperforate; spire conical; whorls convex, longi- 
tudinally (i.e. transversely) 4-costate; ribs unequal, tuberculated 
or muricated ; last whorl 13-costate : aperture roundish. 
Dollfus admits that his shell is near to Turbo Meriani. 
Description. Fig. 9a.—Specimen from the Coral Rag of North 
Grimston (my Collection). 
MGTIO Fassia sets iolara cretauteie aleatoetemalerslsefrete ietn sisters fois 15 millimétres, 
SPR ASEGIU D2! s'.' stds wee do's gare euenin alata state emt Viernes 10 9 
Prpralsangle, average iis. au, iaeisianlslebin atts. melate 56°. 
Shell half as long again as wide, oval oblong, not umbilicated. 
Spire composed of about six whorls, of which the last exhibits con- 
