266 
Aug. F. Foerste 
however, is not so characteristically mucronate at the ends of 
the hinge-line, nor so characteristically obliquely wrinkled along 
this posterior margin. Since the original description of Rafines- 
quina squamula is not readily accessible, it is here reprinted. 
11. Catazyga erratica, Hall 
Catazyga erratica, or rather Orthonomaea erratica, was described 
from drift material collected in Wayne* or Monroe counties. It 
was reported by Hall from near Washington ville, in Oswego 
county. Very typical specimens occur a short distance down 
stream from the railroad bridge, about a mile east of Pulaski. 
It occurs also at Lorraine village, a mile south of Barnes Corners, 
2 miles northeast of Lorraine on the road to Worth ville, and, at a 
higher level, about half a mile down stream from Salmon River 
Falls. If this species was found by Conrad it must have been 
included in the group identified by him as Delthyris striatula, 
under which name he listed chiefly the common Dalmaneltce of 
the New York Trenton and Lorraine. Washingtonville was 
located on Little Sandy creek. It was the type locality also for 
Cyrtolites ornatus. Hall listed from this locality also Byssonychia 
radiata, Modiolopsis modiolaris, Clidophorus planulatus, Hormo- 
toma gracilis, Ormoceras crehriseptum, and Rafinesquina alternata, 
indicating that the exposures at Washingtonville correspond 
approximately to those east of Pulaski, near the railroad bridge. 
Species of Catazyga occur at numerous localities in the province 
of Quebec in Canada. The A^arious forms can be distinguished 
readily only when good specimens, preserving the original curA-a- 
tures of the A-aRes, are present. Flattened shells may be recog- 
nized readily generically, but the more exact specific determina- 
tions may be impossible. Usually, it is assumed that specimens 
occurring at the Richmond horizons belong to Catazyga headi, 
while those at lower horizons, in the Lorraine, all belong to 
Catazyga erratica. This, however, requires verification. 
Catazyga occurs at A^arious localities east of Ottawa. About a 
mile west of Edwards station, it occurs along a small stream south- 
east of a church located south of the pike. It formerly occurred 
along the railroad about a mile northwest of Hawthorne. Three- 
fourths of a mile west along the railroad, from Vars, and then 
half a mile northward, it occurs along the country road. A quar- 
