129 
HKEICINA expansa. 
TAB. CCUXXITI---Figs. 1, 2, and 3. 
Spec. Cuar. Carinated; above, depressed, coni- 
cal, obscurely striated; beneath, ventricose ; 
callus expanded. 
A wrarty smooth shell, the whorls of which are flat 
above, but very gibbose below an obtuse distinct ca- 
rina. The callus which terminates the columella is 
considerably expanded over the base of the shell; 
aperture quadrangular. | 
Found in the Blue Lyas of Lyme in Dorsetshire : it 
seems to be a rare species, as Mr. De la Beche, to 
whom I am indebted for the use of the specimen figured, 
has but one individual : it is in good preservation, in an 
indurated Marle, which fills it, but does not adhere 
strongly to the surface : the shell is converted into cal- 
carious spar, 
HELICINA solarioides. 
TAB. CCLXXIIL.---Fig. 4. 
Spec. Cuar. Subdiscoid, obtusely carinated ; 
whorls depressed above, convex beneath. 
Wars is very similar to the last, but is a much shorter 
shell: the callus is less spread and more convex, and 
the carina not so distinct: it is also obscurely striated. 
Is it possible that this is the young of the preceding ? 
lts carina being more obtuse rather militates against 
that idea. I know not what part of England it was 
found in: it is in a similar Marle with the preceding. 
