Edwards—Descriptions of Cyprea and Marginella. 541 
regular, moderately distant over the middle and posterior parts, but 
more closely set towards the base; and they extend from the colu- 
mella over the whole surface to the edge of the outer lip. The lon- 
gitudinal lines are more numerous and more slender than the trans- 
verse lines. The aperture is elongate, narrow, slightly curved, 
widely but not deeply notched at the base, and prolonged posteriorly 
into a wide, short canal. The outer lip presents a series of teeth 
formed by the ends of the transverse lines ; and the inner lip is fur- 
nished towards the front with four or five pliciform teeth, distinct 
from and more prominent than the teeth formed by the ends of the 
transverse lines. 
The specimen figured is, I believe, unique, and is unfortunately 
somewhat crushed: the foregoing description, therefore, must be re- 
ceived provisionally. In the ornamentation the shell closely resem- 
bles C. elegans (Defr.), except that it does not present the fine lines 
which most frequently intervene between the prominent transverse 
lines on the French shells ; and it is apparently more cylindrical and 
not so much attenuated in front: the aperture also is more regularly 
curved, and the pliciform teeth on the inner lip are distinct in charac- 
ter and less numerous than those on the inner lip of the shell C. ele- 
gans. In form the present shell more closely resembles C. sulcosa 
(Lam.), but it appears to be wider at the base, and the ornamentation 
is quite distinct. A more perfect specimen may lead to the conclu- 
sion that the English shell is merely a variety of C. elegans. 
Size: In the direction of the axis, rather more than 6-12ths of an 
inch; diameter, 4-12ths. 
Locality: Bramshaw (Mus. Edw.). 
7. MARGINELLA ZSTUARINA (F. E. Edwards) ; Plate XIV. fig. '7 a—c. 
Marginella pusilla (Edw.), Eocene Mollusca (Gasteropoda), p. 
143, t. 18, f. 6, in parte. 
M. testa minima, ovali: spird brevissima, sulco obscuro circum- 
data; apice obtuso : apertura elongata postice angustd, antice effusa ; 
ad basin latiusculo non profunde emarginata ; labro submarginato, 
intus crenulato; labio quinguies vel sexes plicato; plicis duabus 
anticis proeminentibus, obliquis ; ceteris transversis, fere obsoletis. 
Shell minute, oval ; spire very slightly elevated, and circumscribed 
by a shallow sulcus almost obliterated by the enamel; apex obtuse. 
The aperture elongated, narrow behind, effuse and rather widely but 
not deeply notched in front: outer lip thickened alone the outer 
margin, and very finely crenulated within, The inner lip presents 
two thick, prominent, oblique folds in front, and three or four trans- 
verse folds, almost obsolete, behind. 
Since the publication by the Palwontographical Society of the 
third part of my monograph of the Eocene Mollusca, in which I re- 
ferred the present species to Marginella pusilla, a High Cliff species, 
I have obtained several additional specimens as well from Headon 
Hill as from other synchronous deposits, and a more rigid comparison 
has induced me to separate the Headon Hill shells from the High 
Cliff species. The MZ. estuarina is, in fact, distinguishable from 
