356 A. Winchell on supposed New Cephalopods. 
epee while the position of the siphon admits of somes 
oubt. 
ORTHOCERAS OCCIDENTALE, Nn. sp. 
situa 
and periphery, constricted where it passes through the septa, 
about ‘06 in diameter in the chamber and -(4 in the constriction. 
Localities. In the Marshall sandstone at Marshall and Moscow. 
This species differs from O. Muensterianum de Kon. (An. Foss., 
pl. xlviii, 1, 5), by its nearly transverse instead of very oblique 
septa. 
OrtHoceras BarQuianvM, 2. sp. 
compressed) about 10°; transverse section an ellipse whose 
minor axis is to the greater as 85: °50=1'48; septa somewhat 
; distance 
between the septa about one-fifth the greater axis at the gr" 
place. No surface markings evident from an examination © 
Locality. Near the light house at Pt. aux Barques in & hard 
bluish sandstone embraced in the shales of the fares Group. 
but its apical angle is somewhat less, its septa more oblique, na 
Orrnoceras MARSHALLENSE, 2. sp. 
Septate portion of shell more than 5°75 inches long; ie 
apical angle 6°; transverse section an ellipse whose axes ara 
each other as 36: °61=1-69; ratio of interseptum to gree 
axis ‘25; -45=1°8; septa very concave, the concavity equaling 
‘17; siphon on the minor axis, a little excentric. The cast ¢ 
ality. In the Marshall sandstone at Marshall. ic 
__ This species is readily distinguished from its allies and nt 
ciates by the great distance of the septa from each other, 
the very gradual taper of the shell. 
OCERAS CLIN@CAMERA 
ie 4% i OrtH TUM, ND. Sp- oa 
The only specimen of this quite distinct form is only 14 _— 
