56 PROCEEDINGS COTTESWOLD CLUB 1907 
Locality and Stratum :—Gloucestershire, Churchdown. 
This locality yielded the specimen figured by Davidson, 
and also the example in the collection of Mr E. T. Paris, 
now figured (PI. vi, figs. 15, 16); Davidson says, Lower 
Middle Lias. Gloucestershire, Aston Magna (near Block- 
ley), Tomes collection, B17251°, British Museum. 
Ty; -CINCTA SESTERTIUS, 5/,%., PI. V, figs. 1a 
Description :—Elliptical, gibbous, anteriorly flattened, 
and incipiently bilobate ; posterior end somewhat convexi- 
fastigate, growth halts frequent, beak somewhat separated 
from umbo. Apical angle not continuously regular, about 
80 in average. 
Distinction :—From C. dis, narrower and earlier bilo- 
bate; from C. obolus, the shape, especially less acuminate 
posteriorly ; from C. conocod/zs, Rau, not so stout, narrower, 
and the beak more separate from umbo. 
Remarks -—Sestertius in Latin was the name of a coin, 
and it also was used in the sense of samemus, money. 
Sestertium was, among other things, a pickaxe, and there 
is something of an axe-shape in this species. 
Locality and Stratum :-—Somerset, Radstock, armatis- 
zone, several specimens in Mr Tutcher’s collection. 
18. CINCTA INOPS, sf. x., Pl. V, figs. 9, 10. 
Descriptior# : — Subelongately pentagonal, somewhat 
stout; anterior margin truncate and thickened. Apical 
angle about 98. 
Distinction -—From C. obolus, marginal thickening and 
truncation begins at a smaller size. 
Locality and Stratum :—Somerset, Radstock ; various 
specimens in Mr Tutcher’s collection. Paulton, near 
Radstock, Mr Marshall’s cabinet. 
