HELIX. 45 



of lavig-ata, as Pfeiffer has determined it. The latter 

 species does not occur in New York. 



HELIX MULTILINE ATA Say vol. ii. p. 103, pi. iii. 



Helix multilineata Say, (Biiiney ed.) p. 15. 



DeKay, N. Y. Moll. p. 41. pi. iii. fig. 24. 



Pfeiffer, Symb. ad Hist. Hel. i. 41; Mon. Hel. Viv. i. 290; 



iii. 269. 

 Chemnitz, ed. 2, ii. 41, pi. Ixxi. fig. 17-19, (1849). 

 Reeve, Con. Icon. No. 691, (1852). 

 Deshayes, in Fer. i. 113, pi. 1. c. 



I have a variety of this with an open umbilicus. Anoth- 

 er, received from Mr. I. A. Lapham,of Wisconsin, is small, 

 of an uniform brownish-red, without any revolving lines. 



Another resembles H. Pennsylvanica both in its general 

 form and in the shape of the aperture. These, with those 

 mentioned on p. 104, are the principal varieties. The ex- 

 tremes of size among the specimens in my cabinet are 19 

 and 29 mill, in diameter. 



The varieties mentioned by Pfeiffer and Deshayes are 

 distinguished merely by the revolving bands. In a large 

 suite of specimens it is rare to find two on which these 

 bands and lines are similarly arranged. 



It has been found at Lake Canadaigua, N. Y. (Slack). 



HELIX PENNSYLVANICA Green vol. ii. p. 105, pi. vii. 



Htlix Pennsylvanica DeKay, N. Y. Moll. p. 41, pi. iii. fig. 34. 



Chemnitz, ed. 2, ii. 51, t. 73, fig. 4, 5. {Exd. H. dausa). 



Pfeiffer, Mon. Hel. Viv. iii. 270. (£xd. H. dausa). 



Mrs. Gray, Fig. Moll. An. pi. 291, fig. 5, absq. desc. (Ex. 

 Bost. Journ.) 



Reeve, Con. Icon. No. 676. [Exd. syn.) 



Bland, N. Y. Lye. vi. 299; Notes 23. 

 Helix Mitchdliana Deshayes, in Fer. i. 137, pi. xcvii. fig. 4-7, nee IS-l';. 



Green described this species in 1827, and deposited three 

 specimens of it in the collection of the Philadelphia Acad- 

 emy, where they are still preserved. In 1837 another de- 

 scription and an excellent figure were published by Binney 



