GASTEROPODA. 193 



Me. — Collins' Millpond, Caribou (Nylander). 



Mass. 



*Ancylus tardus Say. 



Say, New Harmony (Ind.) Disseminator, Jan. 15, 1831. "Wa- 

 bash River." Walker, Nautilus, 1904, vol. 18, p. 27, pi. 1, figs. 11, 

 12, 16-23. 



Me. — Aroostook River, Caribou; Orono. 

 Vt. — Hartland. 



*Ancylus parallelus Haldeman. 



Haldeman, Monogr. Limniades, 1841, no. 2, p. [3] of cover. 

 "Vermont." Ibid., 1844, no. 7, Ancylus, p. 11, pi. 1, fig. 6. 

 Walker, Nautilus, 1904, vol. 18, p. 77, pi. 5, figs. 1-9. 



Ancylus rivularis Gould, Inv. Mass., 1841, p. 224, fig. 153 (non 



Say). 



Me. — Collins' Millpond, Caribou Stream, Caribou; Cross Lake; 

 Salmon Brook, Woodland (Nylander). 



Ancylus ovalis Morse. 



Morse, Journ. Portland Soc. Nat. Hist., 1864, vol. 1, p. 44, figs. 

 101, 102. " Bethel, Me." Walker, Nautilus, 1904, vol. 18, p. 79. 



Me. — Androscoggin River, at Bethel. 



Ancylus borealis Morse, 



Morse, Journ. Portland Soc. Nat. Hist., 1864, vol. 1, p. 45, figs. 

 103, 104. " Patten, [Me.]." Walker, Nautilus, 1904, vol. 18, 

 p. 80, pi. 6, figs. 14-16. 



Me.— Patten (Morse) ; St. John River, at Fort Kent (Nylander). 



Ancylus novangliae Walker. 



Ancylus (Ferrissia) novangliae Walker, Nautilus, 1908, vol. 21, 

 p. 138, pi. 9. figs. 5-7. " Cambridge, Mass. 



Mass. — A small pond near Cambridge. 



