20 
PROCEEDINGS OF THE ACADEMY OF 
tact, tlie "body whorl disproportionately enlarged, the aperture effuse and the 
general aspect that of Ldxonema ; hut the condition of the specimens renders 
it unsafe to undertake to decide on specific or even generic characters. 
The general appearance of this species is like that of M. bilineata, Goldf. 
(Petr. Germ. iii. 24, Taf. clxxii. 1,) but the four carinse below the band 
render it easily distinguishable. The casts recall Turritella obsolete Sow. 
from the old red sandstone of Felindre. 
Murchisonia neglecta, n. sp.—Shell of moderate size, turreted, with an 
apical angle of 12°. Suture impressed, whorls convex, slightly flattened above 
the middle, bearing a bilinear band below the middle close to the suture. 
Surface marked by faint, transverse, sinuous strise, which, on the outer por¬ 
tion of the body whorl, appear to assume the character of transverse wrinkles. 
Described from a defective specimen, but the bicristate band on the lower 
side of the whorls is sufficient evidence of its distinctness. It seems to have 
consisted of 8 to 10 whorls. 
Murchisonia Shumardiana, n. sp.—Shell small, conical, consisting of six or 
seven gradually enlarging whorls, somewhat flattened on the base and outer 
surface, so as to leave but a shallow suture ; body whorl obtusely angulated 
at the junction of the basal and lateral surfaces ; aperture broadly cuneate- 
ovate, angulated behind, scarcely effuse in front ; plane of aperture parallel 
with vertical axis of shell. Surface of cast quite smooth. 
Height of shell *57 (100) ; height of last whorl *24 (42) ; diameter of base 
of shell *28 (49) ; length of aperture *23 (40) ; greatest width -17 (30) ; 
apical angle 34°. 
Much resembles the young of M. prolixa, W. and W. It differs in more 
rapidly enlarging whorls, larger apicial angle and the obtuse angulation limit¬ 
ing the basal surface. 
STRAPAROLLUS, Montfort. 
Strapaeollus Barrisi, n. sp.—Shell of medium size, depressed-turbinate; 
whorls four or five in number, moderately impressed, rather gradually en¬ 
larging to the last, which enlarges somewhat rapidly ; surface generally con¬ 
vex, with three rounded, barely perceptible angulations.—the first near the 
somewhat channelled suture, the second along the periphery, and the third at 
the brink of the medium-sized umbilical cavity. Base of the body whorl some¬ 
times slightly flattened, giving an increased transverse diameter to the section, 
—a feature which is associated with a somewhat greater depression of the 
spire. 
Diameter of one of the largest specimens *96 (100); height *67 (69) ; height 
of body whorl *46 (48) ; transverse diameter of body whorl near aperture 
•38 (40) ; approximate diameter of umbilicus *29 (30) ; spiral angle 100°. 
This somewhat resembles a species in the Burlington limestone, but the 
spire is somewhat more elevated, the suture deeper and the whorls are less 
rapidly enlarged. 
Straparollus macromphalus, n. sp.—Shell of moderate size; spire little 
elevated ; whorls barely in contact, graduallly enlarging, with a nearly circular 
section, and circumscribing a broad dish-like umbilical cavity, open to the 
apex of the spire. Surface of the whorls marked by distinct regular strise of 
growth, which arch slightly backward in descending the umbilical cavity, and 
terminate with a slight forward curvature. 
Diameter of shell *84 (100) ; transverse diameter of body whorl near aper¬ 
ture *25 (30). 
A close analogue of some forms of Euomphalus laevis, d’Arch. and Yern., and 
can only be distinguished by its wider umbilicus and slightly sigmoid strise on 
the base of the body whorl. Straparollus costellatus, McCoy, (Pal. Foss., 538, 
pi. 3 H. fig. 3,) is a closely-related form, but differs in some of its surface 
markings and its larger number of whorls. 
