70 
BULLETIN OF THE LABORATORIES 
San^iiinolites inichiganensis, Win. 
(Plate VIII, Fig. lo. ) 
This species has been a puzzle to me, but Prof. VVinchell suggests 
that it is his S. michiganensis. I'he place and date of publication of 
this species are unknown to me. The resemblance is rather with 
Pleurophorus or Goniophora apparently. Found in the shale below 
conglomerate II, at Newark. 
Safiguiiiolites aeolus, Meek. 
(Plate VIII, Figs, i, ii.) 
d"his species is evidently causing some confusion. Walcott fig- 
ures specimens under this name from the Eureka district, which are 
at least very doubtful. Our own specimens do not present entire 
agreement, but are not well preserved ; they are derived from the 
shales below congi. II, with Allonsma winchelli. Meek asserts that 
the stratum referred to is upon the same horizon with that of the Cuy- 
ahoga shale. In as much as there is some reason to doubt this or to 
suspect that the Cuyahoga contains several horizons higher than this 
one, all identifications should be made conservatively. We suspect 
the identity of the specimens figured with the Cuyahoga species and 
reserve judgement. 
Sangiiinolites ohliquus, Meek. 
(Pal. O., Vol. II, Page 306.) 
This shell is abundant one mile south of Newark, in the shale 
below congi. II, with Allorisma winchelli. 
The following measurements indicate the typical proportions : 
No. 
Length. 
Height. 
Thicknes. 
Height 
from front. 
Thickness 
from front. 
Proportions. 
I 
47 
16 
14 
16 
1 1 
I -.34-'. 2 9 
2 
46 
C 
13 
17 
1 1 
1-.36-.28 
3 
43 
15 
1 1 
10 
I -.34-. 2 8 
4 
^7 
13 
T 
17 
5 
6 
(3O 
13 
10 
13 
7 
7 
(50) 
17-5 
16 
8 
42 
c 
13 
16 
1 1 
1-.38-.30 
