126 LAND AND FRESH WATER MOLLUSKS 



Lampsilis borealis Gray. 



Unio borealis GRAY, Ottawa Naturalist, 1882, p. 53, plate with three figures. 

 Lampsilis borealis (GRAY) SIMPSON, Synopsis, p. 535, 1900. 



Range. St. Lawrence drainage. Lake of the Woods! Ottawa, 

 Ontario ! 

 Lampsilis radiatus Gmelin. 



Mya radiata GMELIN, Syst. Nat., vi, p. 3220, 1792. 



Unio radiatus SPENGLER, Skr. Nat. Selsk, n, p. 3, 1792 ; in, p. 62, 1793. 



CONRAD, Mon., n, p. 24, pi. x, fig. 2, 1836. 

 Lampsilis radiatus SIMPSON, Synopsis, p. 535, 1900. 



Range. St. Lawrence and Atlantic drainage, south to North 

 Carolina. Manitoba. 



Lake Winnipeg ! Saskatchewan River ! Nelson River drainage ! 

 Great Slave Lake (Kennicott) ! 



Lampsilis ligamentinus Lamarck. 



Unio crassus SAY, Nicholson's Encycl., Am. ed., n, Art. Conchology, pi. i, 



fig. 8, 1817. Not Unio crassus Retzius, 1788. 

 Unio ligamentina LAMARCK, Anim. s. Vert., vi, p. 72, 1819. KUSTER, 



Conch. Cab., Mon. Unio, p. 23, pi. in, fig. 3, 1852. 

 Lampsilis ligamentinus SIMPSON, Synopsis, p. 539, 1900. 



Range. Mississippi drainage, irregularly distributed in the St. 

 Lawrence drainage. 



Roseau River and Millwood, Assiniboine River, Manitoba. 



Lampsilis rectus Lamarck. 



Unio recta LAMARCK, Anim. s. Vert., vi, p. 74, 1819. KUSTER, Conch. 



Cab., Mon. Unio, p. 35, pi. vi, fig. I, 1852. 

 Lampsilis rectus SIMPSON, Synopsis, p. 544, 1900. 



Range. Entire drainage of the Mississippi and Alabama Rivers ; 

 St. Lawrence system, Red River of the North, Roseau and Assiniboine 

 Rivers in Manitoba ! 



Lampsilis ellipsiformis Conrad. 



Unio ellipsiformis CONRAD, Mon., vni, p. 60, pi. xxxiv, fig. i, 1836. 



Unio spatulatus LEA (1845), Trans. Am. Phil. Soc., x, p. 80, pi. vin, fig. 22, 



1848. 

 Lampsilis ellipsiformis SIMPSON, Synopsis, p. 557, 1900. 



Range. Mississippi drainage north of Lat. 38, St. Lawrence 

 drainage, in part ; Manitoba. 



Red River of the North ! Lake Winnipeg, Manitoba. 



Lampsilis alatus Say. 



Unio alatus SAY, Nicholson's Encycl., ist Am. ed., Art. Conchology, n, pi. 

 iv, fig. 2, 1817. CONRAD, Mon., vn, p. 57, pi. xxxi, 1836. 



