GASTEROPODA. 179 



PHYSIDAE. 

 *Physa heterostropha (Say). 



Gould, Inv. Mass., 1870, p. 483, fig. 735. 



Lymnaea heterostropha Say, Nich. Encycl., 1817, pi. 1, fig. 6. 

 " Delaware river." 



Me. to Conn. — Common in most of the ponds and streams. 



*Physa ancillaria Say. 



Say, Journ. Acad. Nat. Sci. Phila., 1825, ser. 1, vol. 5, p. 124. 

 " Delaware river near Easton, and * * * Connecticut river 

 above Hartford." Gould, Inv. Mass., 1870, p. 485, fig. 736. 



Me. — Mud and Square Lakes, x\roostook Co.; Waterville; 

 Prospect; North Warren. 

 N. H. — Merrimack River. 

 Vt. — Lake Champlain; Hartland. 

 Mass. — Fresh Pond, Cambridge; Lynnfield. 

 Conn. — Connecticut River, above Hartford; near New Haven. 



*Physa sayii Tappan. 



Tappan, Amer. Journ. Sci., 1839, ser. 1, vol. 35, p. 269, pi. 3, 

 fig. 3. " Lake Pipin, * * * Portage County, Ohio." 



Me. — Caribou (Nylander) ; Fort Kent. 



Physa fragilis Mighels. 



Mighels, Proc. Boston Soc. Nat. Hist., 1843 (?), vol. 1, p. 49. 

 " Monmouth, Me." Binney, Smithson. Misc. Coll., 1865, vol. 7, 

 art. 2, p. 89, fig. 153. 



Me. — Monmouth, in a mill pond (Mighels). 



Physa gyrina Say. 



Say, Journ. Acad. Nat. Sci. Phila., 1821, ser. 1, vol. 2, p. 171, 



