176 ANNALS OF THE CARNEGIE MUSEUM. 
minor Lea in his list, from Gasper Creek, Warren Co. I consider 
these forms absolutely identical, and the specimens from Scottsville, 
which I have seen, do not differ at all from specimens from the upper 
Kentucky drainage; and furthermore there are no essential differences 
from the true calceolus as found in the northern tributaries of the 
Ohio, nor from A. minor belonging to the Cumberland and Tennessee 
drainages. Simpson (1914, p. 499) suggests that A. minor may be 
only a local race of calceolus. In the color of the epidermis there are 
slight differences; typical calceolus has an ashy green epidermis and 
green rays, while the form of the Cumberland region is greenish 
yellow in ground-color, with dark green rays. Yet I have specimens 
from this latter region, which are exactly like calceolus in color, while 
darker specimens occasionally are found also in the North. The 
specimens from Green River and Kentucky River stand nearer to 
the minor-type, but otherwise there are no differences whatever to 
be observed. 
It goes without saying that it is not likely that two “‘species’’ of 
this type should exist in the Green River drainage. 
*35. Alasmidonta marginata (Say): Mf; R. 
Listed by Price as Alasmodonta truncata Wright. Rafinesque 
(1831, p. 4) nearly a century ago, cited this species from Green 
River as Alasmodon (Decurambis) scriptum. It seems to be rare. 
*36. Strophitus rugosus (Swainson): O; Mf; R; D; B;S. 
Reported from Rio by Walker. Given also by Price as Str. edentulus 
Say. It seems to be rather rare, for I collected only a few specimens, 
and so did W. J. Clench. Young specimens have a light brownish 
olive epidermis, older ones are blackish. 
le Ptychobranchus fasciolare (Rafinesque): Mm;0;Mf;R;C;D;B;S. 
Also reported by Price as Pt. phaseolus Hildreth. Specimens 
collected by myself at the lower stations (Mm; O; B) are all rather 
small, yet they often have the “humped” shape, which originated 
the name camelus Lea. At the upper stations, the species is quite 
abundant, and attains almost gigantic proportions. 
2 *38. Obliquaria reflexa Rafinesque: B. 
“Common” according to Price. I found only a single dead shell. 
