674 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 14, 
» 2. Proprttipium scasrosum ', Jeffreys. (Plate L. fig. 6.) 
SHELL roundish-oval, expanded, rather thin, semitransparent 
and of a dull hue: sculpture, numerous but not close-set, slight 
strie which radiate from the beak and are more or less covered with 
short tubercles, especially behind ; there are also several concentric 
ridges as in the last-named species: colour whitish: beak small, 
pinched up, incurved, and forming a minute spire of two whorls: 
mouth roundish-oval: margin thin: inside glossy: septum thick 
and strong. L. 0°15, B. 0°15. 
‘Porcupine’ Exp. 1870: Med. St. Adventure Bank. A single 
specimen. 
Differs from P. ancylotdes in being round instead of oval, and in 
having much fewer and tuberculated strize; but I am not quite 
satisfied that it is more than a curious variety. It somewhat 
resembles the young of Gadinia garnoti; but that shell has not the 
internal septum which is characteristic of the present genus. 
3. PROPILIDIUM PERTENUE , Jeffreys. (Plate L. fig. 7.) 
SHELL oval, convex, very thin and delicate, transparent, and glossy : 
sculpture, none: colour whitish: beak small, cylindrical, and in- 
curved, forming a minute spire of two whorls: mouth oval : margin 
even ; inside glossy: septum small. L. 0:1, B. 0:075. 
* Porcupine’ Exp. 1870: Atl. St. 17, 17 @ (4 specimens); Med. 
off Rinaldo’s Chair (1 specimen). 
Distribution. Palermo (Monterosato); 1623 fms. 
The young of P. ancyloides, much smaller than the species now 
described, are more expanded or depressed, and have the same 
sculpture as the adult ; they are also proportionally solid as well as 
of a dull hue. 
The inner layers of most of the specimens are permeated by a 
microscopic and branching spore-like organism, perhaps of a fungoid 
nature. 
An imperfect specimen of another small and apparently distinct 
species occurred also in Station 17. It has the characteristic septum, 
but otherwise resembles a Lepetella. The beak is very much shorter 
than in P. pertenue; and the spire has barely one turn. 
I had originally given the species above described the MS. name 
tenue. 
4, Provrtiprum compressum’, Jeffreys. (Plate L. fig. 8.) 
SHELL differs from P. pertenue in being oblong instead of oval, 
and in being laterally compressed like Patella [Lepetella| latero- 
compressa of Rayneval, a Monte-Mario fossil and, according to 
Dr. Tiberi, living in the Bay of Naples; and it is also not quite 
smooth, but is marked by a few slight longitudinal striz; the beak 
is proportionally longer, somewhat twisted to one side, and nearly 
overhangs the hinder margiu, instead of being placed (as in P. per- 
tenue) at about one third of the distance from it. L. 0-1, B. 0°065. 
‘Poreupine’ Exp. 1870: Atl. St. 17. A single specimen. 
‘ Roughened. ? Very thin or slight. 3 Pressed together. 
