HELIX §. 134. 321 



206G. multilineata Say. (Coll. 1107. — Binn. Terr. 

 Moll. II. p. i03. t. 3 et Leidn ib. I. t. 8. f. 1—6. 

 — /^i\ n. 691. t. 118. — Mesodon Pfr. Vcrs. 

 p. 135. — Anchistoma imtltil. [Mesodon] Ad. Gen. 

 p. 206.) Mon.III. p.269. 



2067. H. Pennsylvanica Green. 



T. imperforata , globoso-conoidea , tenuiuscula , oblique 

 costulalo-striata, striis spiralibus sub lenle confertissime de- 

 cussata, diaphana, nitidula, lutea; spira elata, convexo-conoi- 

 dea; anfr. Sy^ convexi, sensim accrescentes, ultimus rotun- 

 datus, antice deflexus et constrictus, basi profunde excavatus; 

 apertura fere diagonalis, irregulariter subquadrangulari-lunaris, 

 intus submargaritacea ; perist. crasse albolabiatuni , marginc' 

 supero expanso, basali reflexo, columellari declivi, introrsum 

 dentato-incrassato , regione umbilicali tenuiter expanso , ad- 

 nato. — Diam. maj. 20, rain. 17, alt. ISy^ mill. (Coll. Nr. 1108.) 



Helix Pennsylvanica Green Contrlb. to Maclui-. Lyc Nr. 1. p. 8. 



— — Binn. in Bost. Journ. L p. 483. t. 16. 



— — Pfr. Mon. Hel. L p. 291. n. 759. 



— — De Kay Moll. N. York p. 41. t. 3. f. 35. 



— — Chemn. ed. nov. IL p. 51. t. 73. f. 4. 5. 



— — Binn. Terr. MoU. IL p. 105. t. 7. 



— — Reeve Conch. ic. n. 676. t. 117. 



— — (Patera) Alb. Helic. p. 97. 



— — (Mesodon) Pfr. Vers. p. 135. 



— Mitchelliana Desh. in Fer. Hist. p. 137. n. 182. t. 97. 



f. 4 — 7. 

 Polygyra Pennsylvanica M. E. Gray Fig. t. 291. f. 5. 

 Anchistoma Pennsylvanicwn (Mesodon) H. et A. Adams Gen. H. 



p. 207. 

 Habitat Ohio, Pennsylvania. 



206S. H. clausa Say. 



T. subimperforata, conoideo-semiglobosa, solidula, conferte 

 costulalo-striata , nitidula, pallide lutea; spira subregulariter 

 conoidea; anfr. 57^ convexiusculi, sensim accrescentes, pen- 

 ultimus subangulatus, ultimus rotundatus, antice subconstrictus 

 et breviter deflexus; umbilicus angustus subapertus vel in ad- 

 ultis omnino tectus; apertura diagonalis, subregulariter lunaris; 

 perist. crasse albolabiatum , undique subangulatim reflexuni, 

 margine columellari subdilatato. — Diam. maj. 18Vo, min. 16, 

 alt. 11 1/2 mill. (Coll. Nr. 1109.) 



Helix clausa Say in Philad. Journ. H. p. 154; Amer. Conch. 



t. 37. f. 1. 



— — Biiin. in Bost. Journ. L p. 482. t. 15. 

 IV. 21 



