SWALLOW AND HAWN—THE ROCKS OF KANSAS. 181 
This species from the Muschelkalk seems to be identical 
with one of our species from the Upper Permian strata o: 
T: 
SPIRORBIS ORBICULOSTOMA, Swallow. 
Shell small; spire elevated; volutions about three; convex 
on the free side and marked with transverse rug; aperture 
oblique, erp not modified by the preceding volu- 
tion; umbilicus small. 
Our shell differs from the S. valvata. of Goldfuss, which it 
rey ale in the oes 3 > i volutions and the transverse 
d from 8. helix o: g, (Per. Fos., p. 54, pl. v1, figs. 
10-11) i in the form of the ae re. 
ij. Hawn’s collection from the Permian Strata of Kansas, 
attached to Nautilus Permianus and N. occidentalis. 
CRUSTACEA. 
Pumzresta. Species not determined. 
From the Lower Permian ‘teate, on a slab with Thamnis- 
ow Mpebiees onck Acontisonladio anceps @- 
-BRACHIOPODA. 
- Proveeres Carmovmtanvs, Swallow. 3 
- Shell, \ ge, § ub-hemisph erical ; sinus, n | 
from the visceral region to the anterior adie of of the extending 
valve; oon omg recurved beyond and ¥ within the, ee 
: the dorsal valve; dorsal valoe, repaisrly arched, with 
constantly aresibing im the anterior bowler fhe 
