284 EOCENE MOLLUSCA. 
No. 209. Puievrotoma zeta. F. £. Edwards. Tab. XXXI, fig. 16. 
P. testa oblongo-fusiformi, sub-levi: spird sub-conicd: anfractibus convexiusculis ; 
marginibus posticis angustis, concavis ; ultimo anfractu antice repente coarctato, in canalem 
longum, angustum, producto, supra canalem obscure lineato: labro vix arcuato, fere recto ; 
sinu lato, minime profundo, ad humerum collocato. 
A nearly smooth, oblong-fusiform shell, with a somewhat conical spire; the 
whorls slightly convex, having narrow posterior margins, obscurely channelled, with 
a simple sutural edge; the last whorl much contracted in front, and terminating 
in a long, rather narrow canal, over which appear a number of close-set, irregular, 
and very obscure concentric raised lines; the outer lip is scarcely curved, nearly 
straight, projecting towards the front, and the sinus, which is placed on the shoulder, 
is wide and very shallow. 
Although I possess but one specimen, and that imperfect, the smooth surface of the 
shell, and the narrow, nearly straight outer lip, are characters so uncommon among the 
fusiform Pleurotome, that the present species ought not to be passed without notice. 
The outline of the outer lip, indented by the sinus, somewhat resembles the form 
of the Greek letter zefa, from which circumstance the specific name is taken. 
Size.—Axis, estimated at 1 inch and 8-]2ths; diameter, } inch. 
Locality.—Bracklesham Bay. 
No. 210. PLevrotoma tzniotata. Ff. #. Edwards. Tab. XXX, fig. 13, a—e. 
P. testé angustd, elongato-fusiformi, sub-turritd, concentrice lineata: spird elatd, 
acuminata : anfractibus depresso-convevis, ad humeros teniold cinctis, in guventd tuberculatis; 
marginibus posticis latis, concavis, obsolete regulariter sulcatis ; ultimo anfractu in canalem 
longum prolongato ; lineis concentricis supra medias partes anfractuum elevatis, sub-dis- 
tantibus, supra canalem minoribus, crebrioribus, fere obsoletis: apertura oblongo-ovali ; 
labro sub-aliforme, ad humerum profunde sinuato. 
A long, narrow, fusiform, and somewhat turreted shell, spirally lined ; the spire 
pointed and much produced, considerably exceeding the aperture in length; the 
whorls, seven or eight without the pullus, are flatly convex, separated by a deep and 
very perspicuous suture, and girt round the shoulders by a narrow, slightly elevated, 
ribbon-like band, giving to the shell an appearance of being obscurely keeled; in 
the young state the shoulders present a series of small, rather closely set, tooth- 
like tubercles, which are lost in the later whorls. The posterior margins are concave, 
and very wide, sometimes concealing the preceding whorl up to the shoulder; the 
