Lorraine Faunas of New York and Quebec 307 
finer striae. The specimen is not properly cleaned and the fig- 
ure needs republication. 
In the province of Quebec, the same species occurs at several 
localities in the Lorraine between Ottawa and Vars; also on the 
Richelieu River at Chambly, and two miles northwest of St. 
Hugues on the Yamaska River. 
Lyrodesma plana was described by Conrad from the fossil- 
iferous sandstones at the base of the Oswego sandstone section, 
near Rome. The types have been lost and no specimens have 
been discovered since the original description was published. 
39. Rhytimya oehanaj Ulrich 
{Plate I, Fig. 11) 
The shell is strongly compressed, the thickness from valve to 
valve being scarcely more than 4 mm. ; original thickness unknown. 
Basal margin slightly concave, the mesial sulcus practically obso- 
lete, the surface anterior to the umbonal ridge being flattened 
rather than depressed. Posterior outline, at the end of the um- 
bonal ridge, angular rather than rounded. Surface strongly 
striated and wrinkled concentrically, the wrinkles being increased 
to strong folds anteriorly. Above the umbonal ridge the wrinkles 
become faint but the striae remain distinct. The characteristic 
oblique rows of punctae or granules may be detected from the 
anterior fourth of the shell to the umbonal ridge posteriorly. 
Locality. Richelieu River at Chambly, associated in the same 
rock fragment with Catazyga headi, Pholidops subtruncatus, and 
Cleidophorus praevolutus. Collected in 1912 by Aug. F. Foerste. 
Preserved at the Victoria Memorial Museum, at Ottawa, Canada, 
by the Geological Survey of Canada. No. 8423. 
40. Cuneamya scapha — ^brevier, var. nov. 
{Plate II, Fig. 12) 
Shell closely related to Cuneamya scapha, but relatively shorter, 
and hence with a less inclined umbonal ridge and mesial sulcus. 
The angle between the umbonal ridge and the hinge-line is approx- 
imately 45 to 50 degrees, the median part of the mesial sulcus 
forming an angle of about 70 degrees. The mesial sulcus has a 
