248 
GASTEROPODA OF THE INFERIOR OOLITE. 
Bibliography, ^c. — The figures by Phillips and by Morris and Lycett, though 
supposed to represent the same specimen, are very unlike. The specimen from 
the Leckenby Collection figured in the ‘ Geological Magazine ’ is in a more 
satisfactory condition, and affords a better notion of the species. One of those 
figured in the present work, though small, has the mouth very well preserved. 
Description : 
Spiral angle .... 45° — 55°. 
Height of body-whorl to entire shell . . 60 : 100. 
Length ..... 20 — 30 mm. 
Shell stumpy, and in the majority of cases without any trace of umbilical 
slit ; angle of spire regular, apex probably sharp. Number of whorls from five to 
six, flat, angular, and step-like, with the posterior margins projecting; suture 
slightly channeled. Body- whorl strongly bicarinated, the keel near the suture 
being obtuse, the anterior keel sharp and prominent, the space between the keels 
slightly constricted, aperture oval and well rounded in front. 
The available specimens present no trace of ornament. Specimens from the 
Lincolnshire Limestone have a narrower spiral angle, are less canaliculate, and 
the anterior keel of the body whorl is usually less sharp. 
Relations and Distribution. — Gloughtonia cincta seems to stand alone in our 
Inferior Oolite. It may possibly be represented in France by Chemnitzia curta, 
d’Orb. (‘ Terr. Jur. ii,’ p. 44, pi. ccxxxix, figs. 6, 7). 
It occurs in all three zones of the Inferior Oolite on the Yorkshire Coast, but 
is most abundant in the Scarborough Limestone. It has also been found on the 
same horizon in the Castle Howard district. A few specimens are found in the 
Lincolnshire Limestone at Weldon and Ponton, but none have hitherto been 
discovered either in the Cottes wolds or in Dorsetshire. 
Genus — Boueguetia, Deshay es in Terquem, 1871. 
Shell large, conical-turrited ; spire long, sharp; whorls convex, ornamented 
with spiral strise ; last whorl ventricose ; aperture entire, oval, angular behind, 
round and enlarged in front ; lip simple, sharp .’’’ — Fischee. 
The 1st section of Bourguetia may be said to consist of one variable and wide 
ranging species, which extends from the Inferior Oolite to the Corallian. 
