Foerste.] 
292 
[May 1, 
the upper part of the last volution near what appears to have been 
the oral aperture. These striae are directed obliquely forward and 
do not reach beyond the middle of the volution, making it impos- 
sible to tell even with moderate confidence, to what genus this 
species belongs. We have referred it to Conrad’s species from the 
Clinton of New York, chiefly on account of agreement in form but 
not in size, our Ohio specimen being considerably smaller. Judg- 
ing from the few striae left on this specimen, it is not a Murchisonia. 
Somewhat similar markings, at least in direction, are indicated in 
Conrad’s published figure. 
Euomphalus c/. sinuatus, Hall. 
(PLATE V, FIGS. 10-12.) 
Two fragments of a species of Euomphalus were found at Col- 
linsville, Alabama. One appears to have belonged to an evolute 
shell. The other, which was far more satisfactorily preserved, was 
undoubtedly involute. Only parts of two coils remain in this frag- 
ment ; judging from these, the completed shell consisted of perhaps 
three volutions, the spire was very low and the umbilicus broad and 
open. The figure representing the completed shell, viewed laterally 
is entirely conjectural, although having as a basis the elevation of 
the second volution in one fragment above the third or outer volu- 
tion. From this fragment, we however know with certainty, that 
the sinus was situated on the exterior side of the volutions, slightly 
above the middle. The position of this sinus is indicated on the shell 
by a narrow and not always very distinct raised line, bordered on 
the upper side by a very shallow groove and on the lower side by 
one somewhat more distinct. This lower groove extends in width 
almost to the middle of the volution. 
From the raised line marking the sinus, fine striae pass obliquely 
forwards. Those above this line continue to curve forward obliquely 
until quite close to the inner margin of the volution where the cur- 
vature becomes lateral or slightly backwards. Below this line the 
striae also pass obliquely forwards for a short distance along the side 
of the volution, but along the lower side of the volution the course 
of the striae is transverse to the volution ; here the striae are also 
almost straight, scarcely curved, but at the inner margin a slight 
posterior curvature is noticeable. 
The volutions have a transversely elliptical section, the flattening 
