180 GASTEROPODA OF THE INFERIOR OOLITE. 
are distinguished by large oval granulations, drawn out spirally, but arranged so as 
to form the axial coste of the spire. In the body-whorl the oval granulations are 
sometimes lost. Body-whorl much constricted anteriorly, and not unfrequently 
showing a tendency to detach itself. Aperture small, thickened, and orbicular. 
Relations and Distribution—This species was originally described from a 
specimen obtained from the Millepore Rock of the Yorkshire coast, which differs 
in some details from Weldon specimens. It is more slender than Fv. strangulata, 
besides differing very much in ornamentation. The large oval granulations and 
general coarseness of the spiral lines completely distinguish this species from Ez. 
pulchra and He. formosa. 
110. Exentssa Normanntana, D’Orb., 1850. Plate XI, fig. 9. 
1850. Crrtrnium Normanntanum, D’Orb. Prod., i, p. 271. 
Bibliography, §ce.—D’Orbigny describes his species as near to C. contortum, 
but shorter and provided with seven longitudinal rows of cost. It occurs at 
Bayeux. By the kindness of Prof. Eugene Deslongchamps I possess a specimen 
from the “ Oolite ferrugineuse,” thus identified. It is barely 12 mm. in length, 
and is pupzform, so that its resemblance to O. contortum is very slight indeed. It 
has seven longitudinal rows of costa, as stated by D’Orbigny.° Whether it should 
be referred to Brelissa or to Cryptaulax is not quite clear. The small size and 
pupoid shape are in favour of the former view, whilst the ornaments are more 
those of Cryptaulaw. No perfect aperture has been seen by me. 
Description.—Length about 10 mm., width two-fifths of the length. Shell 
pupxform. Number of whorls about eight, polygonal, and well separated by the 
suture, the last whorl narrowing towards the base. Ornaments rugose ; regarded 
longitudinally, 7. e. in the direction of the axis, there are eight rows of costa, the 
spirals in each whorl being three in number, and grossly tuberculated for so small 
a shell, especially as regards the first and third spirals. Columella short and 
encrusted by the peristome, which is subcircular and situated in the base of the 
shell. Other indications wanting. 
Relations and Distribution.—In size, shape, and details of ornamentation, 
English specimens agree fairly well with tho8e from Bayeux, the chief difference 
being that there are eight rows of costz instead of seven. 
It may be that this rugose little species serves to form a connecting link 
between Hvelissa and Oryptaular. Before deciding we await better specimens ; 
both Hzelissa and Cryptaulax are very tender in the mouth. 
Occurs at Stoford, Burton Bradstock, and Grove—in the Parkinsoni-zone. 
