56 NEW YORK ^ ATE MD8EUM 



Nebraska. 



Marsh. 



Missouri. 



Missouri river, Kansas City Beecher. 



Tennessee. 



Cumberland river, Nashville Hinkley. 



Georgia. 



Murray county Coll. Phila. Acad. 



Alabama. 



Marsh. 



Mississippi. 



Marsh. 



Indian Territory. 

 North Fork, Canadian river Quintard. 



There seems to be no trustworthy record of the occurrence of 

 living Unio alatus in the Champlain canal near Troy and Water- 

 ford, and, so far as known, there is no trustworthy record of its 

 occurrence in any portion of the Hudson area. De Kay (Zoology 

 of New York, Mollusca, page 195) says "Dr. Newcomb has ob- 

 tained very fine specimens from the Northern canal, near Water- 

 ford." Truman H. Aldrich (Twenty-second Eeport New York 

 State Cabinet, page 17), commenting upon De Kay's statement, 

 says, "in the spring of 1867, the canal was searched for it, both 

 above and below Waterford, for several miles, without success. 

 Mr. H. Rousseau found a single valve in the canal at the weigh 

 lock (West Troy)." . 



The Philadelphia Academy of Natural Sciences has specimens 

 of this species presented by Dr. James Lewis and. labeled "Mo- 

 hawk, N. Y." The locality is almost certainly a mistake, as Dr. 

 Lewis does not report the species from Mohawk in any of his 

 publications. 



Disregarding the dead valves reported from the Erie and 

 Champlain canals, and De Kay's statement that fine specimens 

 were obtained at Waterford, and the Academy specimens cred- 

 ited to Mohawk, N. Y., the above list of localities shows that the 

 species is confined to the St. Lawrence and Mississippi drainage 

 systems. The species occurs in both these systems in New York. 



