Notes on Cincinnatian Fossil Types 
339 
46. Vallatotheca manitoulini, Foerste 
{Plate V, Fig. 6) 
1911^. Vallatotheca manitoulini Foerste, Bull. Sci. Lab. Denison Univ., p. J^82, 
Plate If., Figs. U A, B) 
The t 5 rpe, No. 8448 in the Victoria Memorial Museum, at Ot- 
tawa, Canada, was found in the Waynesville member of the Rich- 
mond at the Clay Cliff, about four miles south of the termination 
of Cape Smith, on the eastern shore of Manitoulin island, in Canada. 
In the present Bulletin, a figure, enlarged about three and a half 
diameters, is introduced in order to show the radiating striae and 
the lamellose lines of growth of the shell. At each of these so-called 
lines of growth a single lamella curves upward and outward suffi- 
ciently to become free from the general surface of the shell for a short 
distance. The radiating striae are not strictly continuous from one 
lamella to the next, each lamella representing a more or less distinct 
growth of the margin of the shell. 
47. Endoceras arcuatum, J. F. James 
1886. Colpoceras arcuatum, James, Jour. Cincinnati Soc. Nat. Hist., 8, p. 2Jf2, 
Plate Jf,, Figs. 1,1a 
The type of Colpoceras arcuatum should be present in the 
Museum of the Cincinnati Society of Natural History, but has been 
lost. According to the author of the species, specimens of the same 
species should occur in the U. P. James collection. Two specimens, 
labelled Colpoceras arcuatum, and found at Cincinnati, Ohio, are 
numbered 657 in the James collection at Chicago University. Of 
these only one shows the degree of tapering demanded by the 
figure of the type illustrated by James. This specimen is 125 mm. 
long, 32 mm. wide at the larger end, and 20 mm. wide at the smaller 
end. The specimen consists of a nearly smooth siphuncle, crossed 
by faint oblique markings indicating the lines of contact with the 
septa. Six cameras in a length of 58 mm. were present near the 
middle of the specimen, and possibly 12 cameras may formerly have 
been present in its entire length. Parasitic bryozoans are attached 
to the exterior of this siphuncle and it probably came from the 
lower part of the Maysville group at Cincinnati, Ohio. 
The second specimen, bearing the same number, figure 10 
on plate VI of this bulletin, tapers considerably less than the type 
and is regarded as belonging to a different species of Endoceras. 
