FAMILY VIVIPARID^ I25 



Campeloma decisum Say. 



Liinnaa decisa Sav, Nicholson's British Encyclopedia, ist Am. ed., pi. 11 1 



fig. 6, 1817. 

 Paludina decisa Sa.\', op. cit., 3d ed., pi. 111, fig. 6, 1819. — Halijuman, 



Mon. Limn., Paludina, p. 4, pi. i, 1840. 

 Milan/ho daisa Binney, Land and Fvv. Sh. N. ^Vm., in, p. 41, figs. 79-82. 



1865. 



Jia»i^'c. — Eastern North America from tiic Rio Grande to Nova 

 Scotia, west to Nebraska, north to the Saskatchewan. Lake Superior 

 to the Saskatchewan (Ricliardson) ; Lake of the Woods, Manitoba, 

 (rare, Hanham) . 



It is not unlikely that the extension of the range of tliis species as 

 far north as the Saskatchewan is unwarranted, so many of the data in 

 Sowerby's list, in Richardson, seem erroneous, but the presence of the 

 species in the Lake of the Woods seems authentic. 



NAIADES. 



In discussing the Naiades, the arrangement proposed by Mr. Chas. 

 T. Simpson, in his recent Synopsis of the Naiades,' is adopted, which 

 see for fuller .synonymy. 



Genus Lampsilis Rafinesque. 

 Lampsilis ventricosus Barnes. 



C'/iio ventricosus B.\k.nes, Am. Joiirn. Sci., 1st sen, vi, p. 267, pi. xiii, fig, 



14, 1823. 

 Lampsilis ventricosus Simpson, Synopsis, p. 526, 1900. 



Range. — Entire Mississippi drainage, the St. Lawrence system, 

 southern drainage into Hudson Bay. 



Lake Winnipeg; Battle River, Manitoba, and north to Nelson 

 River ! and its tributaries, in north latitude 57°. 



Lampsilis luteolus Lamarck. 



Unio lutcola Lamakck, Anim. s. Vert., vi, p. 79, 1819. — Sowerby, Conch. 



Icon., XVI, Mon. Unio, pi. lviii, figs. 293, a-b, 1867. 

 Lampsilis luteolus Simpson, Synopsis, p. 534, 1900. 



Range. — Entire Mississippi drainage and southwest to the Brazos 

 River, Texas ; entire Dominion of Canada east of the Rocky Moun- 

 tains and north to the Red River of the North ! 



Lake Winnipeg ! Lower Saskatchewan ! Battle River, Manitoba. 

 Hill River, Keewatin ! (var. stiperiorensis Marsh). Great Slave 

 Lake I Lake Athabaska ! Moose Factory, James Bay ! Manitoba Lake. 



'Proceedings U. S. Nat. Museum, vol. xxii. pp. 501-1044, 1900. Separate 

 paper No. 1205, with pp. i-viii prefixed. 



