36 University of Michigan 
men of unusual diameter, and to either discredit his locality 
or grant a considerable extension of the known range of spe- 
cies. Adding to this, there is no figure and the type is lost. 
On the whole, it appears that Lasmigona subviridis (Con.) 
should stand and U. viridis Raf. go into the discard.” (H. 
Ae es) 
LASMIGONA (ALASMINOTA) HOLSTONIA (Lea), 1838 
Type locality: Holston River. 
Alasmodon (Sulcularia) badium Rafinesque, °31, p. 5. 
Margaritana holstonia Lea, ’37, p. 42, pl. 14, f. 37. 
Alasmidonta holstonia (Lea), Simpson, ’14, p. 502. 
Alasmodon badium Raf.= Marg. holstonia Lea, Frierson, ’14", p. 7. 
Symphynota (Alasminota) holstonia (Lea), Ortmann, ’14, p. 43. 
Lasmigona (Sulcularia) badia (Raf.), Ortmann, ’18, p. 557. 
From the original description of Al. badiwm we cannot be 
sure that M. holstonia Lea was intended. ‘The term “obtuse” 
used for the cardinal tooth suggests also Alasmidonta minor 
(Lea), as in holstonia the teeth are generally rather sharp. 
Other characters of the shell are very indefinite and do not 
furnish any positive indication of the species. 
Thus Al. badium is not identifiable, and with the specific 
the subgeneric name (Sulcularia) also should be discarded. 
LASMIGONA (LASMIGONA) COSTATA (Rafinesque), 1820 
Type locality: Kentucky River. 
Alasmidonta costata Rafinesque, ’20, p. 318, pl. 82, f. 15-16 
Alasmodonta rugosa Barnes, ’23, p. 278, pl. 13, f. 21. 
Lasmigona costata Raf., Rafinesque, ’31, p. 5. 
Alasmodonta costata Raf.=A. rugosa Bar., Conrad, ’34, p. 72; 
Ferussac, 735, p. 25. 
Symphynota (Lasmigona) costata (Raf.), Simpson, ’oo0, p. 665; ’14, 
p. 488. 
Lasmigona costata (Raf.), Frierson, ’14¢, p. 40. 
There is no doubt about this species. The original descrip- 
tion and figure distinctly indicate the chief characters of it. 
