PTEROPODA. 
189 
interior and the exterior, with the thickness of the shell, is shown in the 
small ‘circular figure. The specimen, figure 3, is an extremely elongated 
tubular body in compact limestone; but its surface characters are entirely 
obliterated by weathering. In a single small block of shaly limestone there 
are three similar forms—one of which shows obscure transverse markings 
(plate XXXII A, figure 3). 
At a locality of the higher beds of the limestone in Erie county, some 
tubular bodies which I refer to this species are very abundant. The shell 
is thick and converted into spathic calcite (figure 4, plate XXXII A). 
Formation and localities. The typical specimens occur in the higher cherty 
beds of the Upper Helderberg limestone at Jamesville in Ontario county. The 
species also occurs to the south of Columbia in Herkimer county, and at 
Eastman’s quarry in the south part of Oneida county; and is abundant in the 
limestone at Clarence Hollow in Erie county, N. Y. 
Coleolus? Mohri, n. sp. 
PLATE XXXII A, FIG. 5. 
Form cylindro-conical, elongated, curved and very gradually attenuate from the 
larger extremity. 
Surface transversely striated. 
The length of the fragment under examination, which is curved and imperfect 
at both extremities, is about three and a half inches. Diameter at the larger 
extremity about half an inch, and at the smaller extremity one-quarter of an 
inch. The shell has been comparatively thick, and is converted into crystalline, 
calcareous matter. 
The surface has been marked by somewhat regular transverse striae, which, 
as preserved in the impression of the exterior, have been sometimes crowded 
into fascicles of unequal strength. In the impression* of one side of the shell, 
there is no evidence of an interruption of the striae, or of any longitudinal striae. 
This tubular fossil is referred to the genus Coleolus with much hesitation, 
