PELECYPODA. 23 



Mass. — Wayland; Woburn; Newton; Fresh Pond, Cambridge ; 

 Plymouth; Concord. 



R. I. — Providence; Rhodes; Warwick. 

 Conn. — Stonington; Hartford. 



*Lainpsilis (Proptera) alata (Say). 



Simpson, Descriptive Cat. Naiades, 1914, p. 162. 

 Unio alatus Say, Nich. EncycL, 1816, vol. 2, pi. 4, fig. 2. " Lake 

 Erie." 



Metaptera alata Stimpson, Shells of New England, 1851, p. 14. 



Vt. — Larrabee's Point; Chimney Point, Lake Champlain. 



*LainpsiIis (Proptera) gracilis (Barnes). 



Simpson, Descriptive Cat. Naiades, 1914, p. 181. 

 Urvio gracilis Barnes, Amer. Journ. Sci., 1823, ser. 1, vol. 6, p. 

 274. " The Wisconsan * * * and the Lakes ". 



Metaptera gracilis Stimpson, Shells of New England, 1851, p. 14. 



Vt. — Larrabee's Point; Shoreham; Chimney Point, Lake 

 Champlain. 



Strophitus edentulus (Say). 



Simpson, Descriptive Cat. Naiades, 1914, p. 345. 



Alasmodonta edentula Say, New Harmony (Ind.) Disseminator, 

 1829, vol. 2, no. 22, p. 340. " Wabash River." 



Anodon undidata Gould, Inv. Mass., 1870, p. 182, fig. 482 {non 

 Say). 



Vt. — Lake Champlain and its tributary streams. 



Mass. — Blackstone River and its tributaries ; Westfield. 



Conn. — Connecticut River at Hartford. 



Strophitus undulatus (Say). 



Simpson, Descriptive Cat. Naiades, 1914, p. 349. 



