UNAUTHENTICATED AND DOUBTFUL SPECIES. 
POLYGYRA PALLIATA ALBA (Currier). 
Listed, but without description, by Currier in‘his cata- 
logue of 1868, where it is stated that it is in ‘‘my cabinet.” 
I have been entirely unsuccessful in locating this form. It is 
not now in the Currier collection, which is in the possession 
of the Kent Scientificate Institute of Grand Rapids. Nor has 
it been found by any of the other collectors of the state. 
POLYGYRA TTHYROIDES BUCCULENTA (Gld.) 
Cited by DeCamp. The citation from my own collection 
in my catalogue of 1894 was based on specimens received 
from DeCamp. so labeled and accepted without due care. All 
of DeCamp’s specimens are now in my possession and prove 
to be Polygyra albolabris minor. ‘The form must therefore be 
dropped as a member of our fauna. 
OMPHALINA INORNATA (Say). 
This must be considered one of the doubtful species. It 
has been listed only by Sager and Miles. No Michigan spe- 
cimens are to be found in any of the existing collections of 
the state. It has been reported by Mr. W. Miller from Grand 
Rapids and from Hart, Oceana county. But unfortunately 
his specimens have been lost or mislaid and it has been impos-’ 
sible to verify the citation. 
ZONITOIDES LIMATULUS (Ward). 
A very doubtful species in Michigan. I have been wholly 
unable to verify its occurrence in the state. It has been cited 
by Miles, Currier, DeCamp and W.G. Binney. Miles’ cita- 
tion was based on a specimen now in the collection of the 
State Agricultural College and which he states was so identi- 
fied by Binney. This shell is not /2matu/us and has been 
determined by Dr. Sterkias Vtrea wheatleyz (Bland). Binney’s 
quotation was, in all probability, based on Miles’ specimen as 
there are no Michigan examples of this species in his collec- 
tion deposited in the U. S. National Museum. It also seems 
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