ORTMANN: NAIADES OF THE GREEN RIVER DRAINAGE. 183 
66. Dysnomia flexuosa (Rafinesque). 
Green River is one of the original localities given by Rafinesque 
(1914, p. 306) for Obliquaria flexuosa. It is a very rare shell, for 
which few exact localities in the lower Ohio are known, and the 
re-discovery of this species in Green River would be very valuable. 
DOUBTFUL AND SPURIOUS SPECIES. 
Fusconaia edgariana (Lea). Cited by Price as Pleurobema ed- 
gariana. This probably is a misidentification, since this species 
belongs exclusively to the Tennessee River, and is missing in the 
Cumberland as well as the whole Ohio drainage. Probably young 
specimens of Pleurobema cordatum have been taken for it. 
“Unio grandiferus Lea.”’ See above under Cyclonaias tuberculata 
granifera and Elliptio crassidens. We do not know what this 
stands for. 
Ptychobranchus subtentum (Say). Unio subtentus has been reported 
by Call (1885, p. 51) for ‘““Green and Salt Rivers, Ky.’’ This species 
belongs to the Tennessee and Cumberland, and is unknown in the 
Ohio system. Since Price does not indicate its presence, Call’s record 
probably is a mistake. 
Actinonaias pectorosa (Conrad). Cited by Price as Lampsilis 
perdix Lea on the same line with L. zris. Whether it is thus indicated 
that the two are synonyms is not clear; but, if so, it is wrong. This 
species (perdix = pectorosa) is a Cumberlandian shell, and has never 
been found anywhere else. 
Carunculina texasensis (Lea). Given by Price as Lampsilis texa- 
sensis. This is a southern species, probably not found in the Green 
River system, and recorded by mistake. 
GENERAL REMARKS ON THE GREEN RIVER NAIAD FAUNA. 
Among the sixty-six forms, more or less positively recognized as 
members of the Green River Naiad Fauna, there are no Cumberlandian 
types. Some, indeed, have been recorded which have been hitherto 
regarded as such; but, as has been indicated above, our views with 
regard to these should be modified. This refers to the following 
three cases. 
Alasmidonta calceolus (Lea). I have taken the form found in 
