Capulus. 
MOLLUSCA. CAFULIDJS. 
S6S 
2. 1. obliquum. — Flattish, smooth ; apex curved, adpressed, oblique ; inter- 
nal plate two-thirds the diameter of the mouth, and reflected near the pillar. 
— Sower. Min. Conch, t. xcvii. f. 1. — London Clay. 
3. I. tuberculatum — Gibbous, [conical, oblique, rugosely tuberculated. — 
(Trochus apertus, Brander., t. i. f. 1, 2.) Sower. Min. Conch, t. xcvii. f. 4, 5. 
London Clay. 
4. I. echinulatum — Gibbous, depressed, conical, oblique ; apex acute, 
smooth; last turn obscurely echinulated.— Min. Conch, t. xcvii. f. 2. 
Plastic Clay. 
5. I. spinulosum. — Conical, apex acute, nearly central ; whorls obscure, 
surface covered with numerous short hollow spines or small tubercles 
Sower. Min. Conch, t. xcvii. f. 6. — London Clay. 
Gen. CREPIDULA. — Shell oblong, widely conical, with a 
depressed marginal spiral apex ; aperture in part closed by 
a projecting horizontal plate. 
1. C. sinuosa. — “ Shell roundish oval, smooth, entirely milk-white ; with 
the margin sinuate. Length half an inch ; breadth four-tenths. Found at 
Scarborough in Yorkshire by Mr Bean. The outer surface is polished, and, 
under a glass appears to be very finely and irregularly striate transversely ; 
but it has no ribs, nor prickles, nor colourings of any kind.” — Dr Turton^ 
Zool. Journ. No. vii. 364. t. xiii. f. 5. (The editors of the Journal add, “ We 
cannot agree with Dr Turton in placing this Crepidula on the British list, 
as Mr Bean informed us that he took it from the bottom of a ship just ar- 
rived from North America.”) 
Gen. PILEOLUS. — >Conical, a short internal spire; aperture 
in part closed by a projecting horizontal plate with a cre- 
nulated margin, and an opposed prominent lip. 
1. P. plicatus. — Obtusely conical, with diverging ridges extending to the 
edge ; margin irregularly crenated, the centre of the base divided. — Sower. 
Min. CoHch. t. ccccxxxii. f. 1-4. — In Oolite at Ancliff and Hinton. 
2. P. Iwvis — Shell rather flat, smooth, with an entire margin. — Sower. 
Min. Conch, t. ccccxxxii. f. 5-8 — Found along with the last. 
CAPULIDiE. 
Gen. LXXXVII. CAPULUS.— Shell conical, with the apex 
towards the margin recurved and subspiral ; muscular im- 
pression semicircular ; foot complicated on its anterior 
margin ; giUs in a single series across the branchial cavity, 
359* C. hungaricus . — Shell acuminated at the spiral apex, 
and divergingly striated. 
The Fool’s*cap, Borl. Corn. 276. t. xxviii. f. 4. — Patella ungarica, Linn. 
Syst. i. 1259. Penn. Brit. Zool. iv. 143. t. xc. f. 147. Don. Brit, 
