96 
PALAEONTOLOGY OF NEW YORK. 
The "callosity of the lip at the lateral angles is a variable feature—being 
sometimes much thickened, and at other times expanded and moderately 
thickened, scarcely covering the umbilicus. In casts the inner volutions are 
more or less distinctly visible, according to the conditions and mode of preser¬ 
vation. Casts from the Schoharie grit in eastern New York, from the Upper 
Helderberg limestone at Clarence, in Erie county, where the shell has been 
replaced by crystalline matter, and from the same formation at Dublin, Ohio, 
show no characters for specific distinction. Specimens from the last named 
locality exhibit the shell in various degrees of preservation. 
The specimens cited in my original description as from Brownville, Ohio, 
present no differences from those which have more recently come into my 
possession from the Dublin locality. This appears to be identical with the 
species described by Mr. Meek as B. propinquus from the Upper Helderberg 
limestone of Ohio; and should farther study prove the western form to be 
distinct from that of New York, this name will be retained. For the purpose 
of comparison, a cast of the Ohio form is figured on plate 26. The specimen 
retains the shell on a part of the opposite side, and also the dorsal carina near 
the aperture, leaving no doubt of its specific relations with figures 7, 8 and 9, 
of plate 22. 
Formation and localities. This species occurs in the form of casts of the 
interior, in the Schoharie grit at Schoharie, in the Upper Helderberg limestone 
at Clarence in Erie county, and in other places in Western New York; and in 
the same formation at Dublin, Ohio. 
Belleropiion Pelops var. exponens. 
PLATE XXII, FIG. 14. 
Belleropiion Pelops, Hall. Illustrations of Devonian Fossils : Gasteropoda, pi. 25, fig. 4 (referred with doubt 
to this species). 
Form robust; exterior shell unknown. 
In the cast three or more volutions are visible in the umbilicus, each one 
having about half its depth concealed in the concavity of the succeeding one. 
