888 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
RAFINESQUINA TRENTONENSIS (Conrad) 
Plate 247, B, figures 5, 6; plate 266, E, figure 17 
Rafinesquina trentonensis (Conrad) Satmon, Journ. Paleont., vol. 16, No. 5, p. 574, pl. 85, 
figs. I-10, 1942 (for complete synonymy). 
The name FR. trentonensis has now superseded the old and familiar Rafines- 
quina alternata. The latter had become almost a fixture in our Ordovician faunal 
lists, but many other familiar names have fallen to nomenclatorial technicalities. 
The details are explained by Dr. Eleanor Salmon in her detailed study of the 
Mohawkian Rafinesquinae. 
Dr. Salmon included R. hermitagensis Bassler under the synonymy of R. tren- 
tonensis, but this seems to be an error. That species appears to differ in shape 
and ornamentation from FR. trentonensis, and to have a less well developed in- 
terior. The Hermitage species was taken in sandstone and is preserved as im- 
pressions on the rock. Nevertheless, all the details of the interior and exterior 
are clearly visible and seem quite distinct from the Trenton species. 
Refinesquina trentonensis is identified in the Guttenberg of Illinois by Dr. Sal- 
mon and in the Guttenberg of Wisconsin by other authors. The specimens in the 
National Museum and ones collected by the writer in Wisconsin and Missouri 
seem to belong to FR. sinclairi rather than FR. trentonensis, but some specimens 
were close to the latter species. More extensive collections may in the future 
show the presence of this species in Wisconsin. 
In the Appalachians Rafinesquina is not well represented in the rocks covered 
by this monograph. It is however found in abundance in the Collierstown forma- 
tion, but the specimens available are too poor for accurate identification. They 
are tentatively placed under the above heading. 
Figured specimens.—97578a,b, 123282. 
RAFINESQUINA in Canada 
In 1946 Dr. Alice E. Wilson described many species of Rafinesquina from 
the Leray-Rockland interval in the Ottawa-St. Lawrence Lowland. None of 
these species has been identified in any of the National Museum collections, but 
they are listed here because they must be checked in any future work on Rafines- 
quina in eastern United States. The first set of figures after the name refers to 
the pages and plates in the original description of most of these species in the 
Transactions of the Royal Society of Canada, ser. 3, vol. 38, sec. 4, 1944; the 
second set of figures refers to Geological Survey of Canada, Bulletin 8, 1946. 
Rafinesquina alternata (Conrad) Wilson, 1946, p. 66, text fig. 1, No. 3; pl. 5, fig. 4. 
R. alternata alata Wilson, 1944, p. 160, text fig. 2, No. 4; pl. 1, fig. 17; 
1946, p. 66, text fig. 2, No. 4; pl. 5, fig. 18. 
R. alternata intermedia Wilson, 1944, p. 161, text fig. 1, No. 1; pl. 1, fig. 1; 
1946, p. 67, text fig. 1, No. 1; pl. 5, fig. 3. 
R. alternata plana Wilson, 1944, p. 161, text fig. 1, No. 1; pl. 1, fig. 1. 
1946, p. 67, text fig. 1, No. 1; pl. 5, figs. 1, 2. 
