102 HELIX §. 20. 



mellari dilatalo, patente. — Diam. maj. 30, miu. 26, alt. 16 miil. 

 (Mus. Cuming.) 



Helix Kochi Pfr. In Proc. Zool. Soc. 1845. p. \ 27. 

 Habitat. . .? 



255. H. solitaria Say..J$r/',^^/./^.^/'r;%?. 



T. late pervio-umbilicata, globoso-depressa , solidiuscula, 

 diaphana, oblique confertim rugosa, lutescenti-cornea, brunneo 

 2 — 3fasciata; anfr. 6 convexi; sutura profunda; apertura lunato- 

 rotundata, intus nitide alba, fasciata; perist. simplex, acutum, 

 margine columellari dilatato, subreflexo. — Diam. maj. 25, min. 

 22, alt. 15 mill. (Coll. Nr. 135.) 



Helix solilaria Say in Philad. journ. II. p. 157. 



— — Binn. in Bost. journ. ni. p. 426. t. 23. 



— — Pfr. Symb. II. p. 39. 



— — Chemn. ed. II. Helix N. 145. f. 2 4. f. 5. 6. 

 Euryomphala solitaria Beck ind. p. 8. 



Habitat in America boreali : Missouri , Ohio. 



256. H. alternata Say. 



T. late umbilicata , orbiculato-depressa , tentiis , luteo-coraea, 

 strigis interruptis, rufis ornata, striis confertis elevatis scabra; 

 anfr. 5/2 planiusculi, ultimus interdum obtuse carinatus; umbiH- 

 cus magnus, pervius; apertura perobliqua, lunato-ovalis ; perist. 

 simplex, acutuin, ad umlDilicum vix expansum. — Diam. maj. 21, 

 min. 19, alt. 10 mill. (Coll. Nr. 136.) 



Helix alternata Say inPhilad. journ. U. p. \6i. 



— — Say in Nichols. Am. Enc. t. 1. f. 2. 



— — (Helicella) Fdr. pr. 199. Hist. t. 79. f. 8. 9. 



— — Bin?i. in Bost. journ. lU. p. 428. t. 25. 



— — Gould report p. 177. f. 114. 



— — Che7nn. ed. II. Helix N. 146. t. 24. f. 17. 18. 



— scabra Lam. 83. p. 88. ed. Dh. p. 66. 



— radiata Gmel. 73. p. 3674? 

 Patula alternata Held in Isis 1837. p. 916. 

 Euryomphala alternata Beck ind. p. 8. 

 Lister t. 70. f. 69? (An potius H. solitaria?) 



/J? Carinata, junior? Fer. t. 79. f. 10. 



Habitat iu America boreali in ripis fluviorum Mississippi, Missouri 



et Ohio; Massachusetts (Gould). 



257i. H. discoides Lesson. i* 



T. discoidea, late umbiUcata, fusco - rubra , fasciis albis 

 tninulissirais et regularibus ornata; anfr. angustissimi , ultimus 



