GASTEROPODA. 97 
Volutions somewhat flattened in the dorso-ventral direction; the outer volution 
expanded laterally, so that the width near the aperture is more than two and 
a half times as great as the height. The last half of the outer volution is 
obtusely angular on the dorsum (becoming rounded on the inner half), 
indicating a carina upon the exterior shell; and the aperture has apparently 
been deeply sinuate. 
This form was originally included under B. Pelops, but a careful comparison 
shows the following differences: The outer volution near the aperture is more 
expanded laterally, the dorsal ridge is not continued backward as in the 
typical forms of B. Pelops, the inner volutions are more fully exposed, and the 
lateral margins of the outer volution are more angular. The only specimen 
of this form observed is much larger than the ordinary specimens of B. Pelops. 
Formation and locality. In limestone of the Upper Helderberg group at 
Clarence Hollow, Erie county, N. Y. 
Bellerophon Newberryi. 
PLATE XXII, FIGS. 15, 16; AND PLATE XXVI, FIGS. 2, 3. 
Bellerophon patulus, H. & W. Twenty-fourth Rep. N. Y. State Mus. Nat. Hist., p. 200. 1872. 
“ “ “ Hall: Illustrations of Devonian Fossils : Gasteropoda, pi. 22. 1876. 
Not Bellerophon patulus, Hall. Geol. of N. Y. Surv. Fourth Geolog - . Dist. 1843. 
Descriptions of New Species of Fossils, etc. 
Fifteenth Rep. N. Y. State Cab. Nat. Hist. 
Bellerophon Newberryi, Meek. Proceedings Acad. Nat. Sci. Phila., p. 77. 1871. 
“ “ “ Geological Survey of Ohio. Palaeontology, vol. 1, p. 222. 1873. 
Shell subglobose. Volutions covered, and the umbilicus closed or rarely per¬ 
ceptible ; dorsum somewhat depressed-convex, with a faint depression 
along the median line. Aperture much expanded, reniform, more than 
twice as wide as the dorso-ventral diameter ; the outer lip expanded 
(dimensions unknown), spreading laterally, and joining a strong callus of 
the columellar lip, recurves, inclosing and partially or entirely covering 
the umbilicus. Callus of the inner lip thick and strong, essentially flat¬ 
tened and spreading outward almost rectangularly to the direction of the 
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