Lorraine Faunas of New York and Quebec 263 
8. Rafinesquina nasuta, Conrad 
{Plate III, Fig. 2 A, B; Plate IV, Fig. 2 C) 
Rafinesquina nasuta was described by Conrad, in the Journal 
of the Academy of Natural Sciences of Philadelphia, vol. VIII, 
part II, p. 260, in 1842, as follows: 
Triangular; longer than wide, slightly winged; inferior valve with the 
umbo and disk flattened; toward the base, suddenly and concentrically 
bent towards the upper valve; concentrically wrinkled; radii distinct, 
rather remote, with three or four minute intermediate lines; base pro- 
jecting and angular in the middle. 
Locality. Near Rome, Oneida county, New York. 
This species resembles S. alternata, and S. deltoidea in having one or 
two of the central lines larger than the rest, but it is a much flatter and 
proportionately longer shell. 
This horizon at Rome furnishes the types also of I schyrodonta 
curta, Lyrodesma plana, Pterinea demissa, the forms of Modio- 
lopsis for which Conrad proposed the term angustifrons but 
which Hall included in M. modiolaris, and Orthodesma nasutum. 
The horizon is about equivalent to that at Bennett bridge, one 
mile down stream from the Salmon river falls. 
In the Paleontology of New York, vol. I, on plate 79, Hall repre- 
sented similar forms, as found at Pulaski, suggesting the extremes 
of variation. Specimens of this type are common at one ferrugi- 
nous horizon near the upper part of the Trinucleus zone, west of 
the railroad bridge, about a mile east of Pulaski. In one rock 
boulder found by Dr. E. O. Ulrich, a short distance west of the 
bridge, there were at least 100 valves of Strophomena nasuta, 
crowded together at all sorts of angles. In the rciajority of these 
the anterior nasute part was narrower than in Fig. 26 of Hall, 
although wider than in Fig. 2a, and the degree of inflection pro- 
ducing the nasute fold was intermediate to that shown by these 
figures. In the same rock boulder occurred Dalmanella, Plectam- 
honites, Cyrtolites ornatus, Byssonychia radiata, Modiolopsis modio- 
laris, Calymene and Trinucleus. 
A nasute form of Rafinesquina was found also in the stream bed 
at Barnes Corners, associated with Pholidops, Plectamhonites, 
Rafinesquina mucronata, a flat form of Rafinesquina alternata, 
Dalmanella, Archinacella pulaskiensis, Hormotona, Byssonychia 
radiata, Modiolopsis modiolaris, Colpomya pusilla, Cuneamya, 
