232 
Kirtley F. Mather 
BELLEROPHONTID^ 
Genus BELLEROPHON Montfort 
Bellerophon crassus var. wewokanus Girty 
Plate XVI, figures 3, 3a. 
1911. Bellerophon crassus var. ivewokanus. Girty, Ann. N. Y. Acad. 
Sci., vol. 21, p. 138. 
Wewoka formation: Wewoka and Coalgate quadrangles, Okla- 
homa. 
1914. Bellerophon crassus var. wewokanus. Price, West Va. Geol. Surv., 
Preston County Rep., p. 532. 
Ames limestone: Portland district, 0.6 mile east of Trowbridge; 
Reno district, 0.5 mile northwest of Fellowsville. 
Brush Creek limestone: Garrett County, Maryland, B. & O. R. R. 
cut at Hutton. 
Two specimens from the Brentwood limestone are referred 
with confidence to this variety. They display the general shape 
and appearance of typical B. crassus but are rather undersized 
for members of that species and in both instances the umbilicus 
is solidly closed. 
Horizon and locality. Brentwood limestone: near Fayette- 
ville, Arkansas (Station 134). 
Bellerophon cf. sublaevis Hall 
Plate XVI, figures JfU. 
A number of small Bellerophons seem to resemble rather 
closely Halks species and are included under this title. The shell 
surface, in the few instances where it is preserved, is perfectly 
smooth, but although two or three individuals present a shape 
closely approximating that of the Mississippian shells the ma- 
jority appear to be narrower and more slender with a more 
flaring aperture. The material at hand, however, is so poorly 
preserved and incomplete that it seems unwise to erect a new 
species for its reception. 
Horizon and locality. Hale formation: East Mountain, Fay- 
etteville, Arkansas (Station 136). Brentwood limestone: near 
Fayetteville, Arkansas (Station 135). Morrow formation: near 
Wagoner (Station 294), and Choteau (Stations 302 and 307), 
Oklahoma. 
