Edwards —Descriptions of Cyprea and Margineila. 539 
bus numerosis, sub pliciformibus ; labro extis sub-marginato, 
postice producto, fortiter arcuato. 
Shell egg-shaped, ventricose, attenuated in front, smooth: spire 
concealed. ‘The aperture is elongate, straight, moderately wide, 
slightly effuse at the base, and obscurely channelled behind. Each 
margin presents a row of numerous regular, narrowish, rather fold- 
like teeth, nearly equal; the anterior teeth being somewhat more 
lengthened than the others. The outer lip is thickened, flattened on 
the inner surface, and the posterior extremity produced, and rather 
suddenly and strongly curved. 
The only specimen of this Cyprea I possess is in an imperfect 
state; but the remarkably straight and suddenly curved outer lip is 
a character which entitles it to specific distinction, and justifies the 
present description. 
It presents some resemblance to C. inflata (Lam.) ; but the pecu- 
liar condition of the aperture and the outer lip, and the absence of 
the small elevated callus found at the posterior extremity of the 
inner lip of the shell in that species, sufficiently distinguish the 
present species. 
Size: In the direction of the axis, 14in.; diameter, 1 in. and 
1-12th. 
Locality : Brook in the New Forest (Mus. Edw.). 
4+. Cypr@zA AaTTENUATA (F. E. Edwards); Plate XIV. fic. 3 a, b. 
C. testa globosa, antice valde attenuata, levi: spira omnino 
obtecta ; apertura angusta, elongata, flexuosa, ad utramque ex- 
tremitatem emarginata ; ; labro incrassato, marginato, antice 
compresso, intis regulariter dentato ; labio plicato dentato, an- 
tice in callum fastigiosum ad basin tendentem elevato, postice in 
callum transversum producto. 
Shell globose, somewhat produced and much attenuated in front, 
smooth; spire altogether hidden by the enamel. The aperture is 
flexuose, narrow, equally wide along the whole length except to- 
wards the base, where it is somewhat contracted by the ridge form- 
ing the termination of the inner lip. At each extremity it presents 
a short canal rather broadly but not deeply emarginate. The outer 
lip is much thickened and spread out, forming a raised margin, 
broad in the middle and at the posterior extr emity, but narr owing 
towards the front. It is much flattened on the anterior inner sur- 
face, and the inner edge presents a series of regular pliciform teeth, 
which gradually decrease in size as they approach the posterior ex- 
tremity. The inner lip is furnished with a row of teeth, prominent 
in front, small and obscure on the middle and posterior extremity. 
In front the lip expands into a narrow, ridge-like prominence, ex- 
tending to the base, and at the posterior extremity it rises into a 
sharpish, transverse ridge, which forms the left wall of the posterior 
canal. 
Size: In the direction of the axis, 8-12ths of an inch ; diameter, 
5-12ths. 
