SHUMARD AND SWALLOW—NEW FOSSILS. 201 
seen. The general appearance of this shell is very 
aah like the rattles of the rattle-snake. 
“Maj. Hawn’s collection from the Coal Measures in the val- 
ley of the Verdigris, K. 3 3 
ORTHOCERAS OCCIDENTALE, Swallow. 
Shell slightly conical, flattened on the side next the siph- 
; septa convex, distant one-sixth to one-fifth their diam- 
ter, periphery elliptical, curved in the pares ae a4 
Bardane se Ee gat 
Maj. Hawn’s valigtion tee Clifton Park, near the junetion 
of the Coal Measures and the Permian Strata, K. T. 
Macrocuun.vs Missovriensis, Swallow. 
iat loblong ovate; spire elongate, dtestitdhine gradually, 
h six or more convex volutiens: aperture wide, ovate, 
about mr oaecdge length of ae shell; body whorl short and large. 
cast the suture impressed, the volutions angular, 
seni a spiral a perpendicular to the axis on their pos- 
oo. 8, which become much broader on body 
My i of fail 1.75; thickness of = whorl, 0.98; spiral 
46°; sutural angle, 81 | 
ily: aperture ov or end rounded, pos- 
bou 1H eng othe sel "oatir ip Yes: 
th of shell, 145; thickness of body whorl, 0.65; Jength 
re a width > —— 0.455, ssa angle, 43° > 
