408 IJELIX §. 153. 154. 



striata; spira planata; sutura profunda; anfr. ^V^ — G, convcxius- 

 culi, regulariter accrescentes, ullimus ad pcripheriam angulatus, 

 infra angulum inflalus; umbilicus infundibuliformis; aperlura 

 obliqua, subreniformis; perist. incrassatum, breviter reflexum, 

 sinuosum, marginibus callo valido triangulari junctis. — Diam. 

 maj. 71/2—872, min. GV^-^V^, alt- 3—3^2 mill. » (B.) 



Helix Febigeri Bland in Tryon Amer. journ. conch. II. 1866. 



p. 373. t. 21. f. 10. 



— — (Polygyra) Binn. ^ Bland Landsh. North-Am. 



" I. p. 108. f. 184. 



Polygyra Febigeri Tryon in Amer. journ. conch. III. 1867. p. 160. 



t. 10. f. 30. 33. 



Habitat prope Nevv-Orleans (Major G. L. Febiger). 



Obs. «Differt a reliquis geueris speciebus deficiente excavalione an- 

 fractus pone labruni.» (Tr.) 



§. 154. 



3355. thyroiius Say. (Goil. 1433.) I. 345 [thyroides Binn.) IIJ. 262. 

 IV. 313. V. 416. — Mesodon Binn. Amer. landsh. p. 147. f. 251. 



— Pdtel Cat. p. 95. — Mesodon thyroides Tri/on in Amer. journ. 

 conch. III. p. 41. t. 8. f. 1. — Var. riifa Michener in Tryon 

 Journ. II. p, 53. (Helix rufa De Kay.) — America borealis. 



8356. devia Gould. (CoII. 1434.) I. 383. III. 262. IV. 313. V. 417. — 

 Newc. in Amer. journ. conch. I. p. 347. — Mesodon Blnn. Amer. 

 landsh. p. 152. L^^S^. — Helix Baskennllei Pfr. (111.230. IV. 313.) 



— Mesodon devia Tryon in Amer. journ. conch. III. p. 42. 1. 8. 

 f. 3. — Vancouver's Island. 



* * * 



3357. plectostoma Bens. (Goll. 1435.) I. 415. III. 262. IV. 313. V. 417. 



— Polygyra Piitel Cat. p. 93. — Darjiling et Montes Khasia. 



3358. Pinacis Bens. •{• V. 417. — Sikkim regionis Himalayanae. 



3359. H. macromphalus W. Blanford. ^ 



«Testa sinistrorsa, late umbilicata, depressa, discoidea, te- 

 nuiuscula, pallido-cornea, superne plicis arcualis obliquis incre- 

 menti et liris sj)iralibus decussata, ad peripheriam et subtus fere 

 laevis, striatula: striis nonnullis spiralibus circa umbilicum ali- 

 quando distinguendis. Spira plana; apice vix emergente; su- 

 tura leviter impressa. Anfr. 4^2 — ^Va planulali, arcte voluti; 

 jjltimus vix latior, supra peripheriam subangulatus, ad latus 

 •atquc subtus convexus, antice leviler descendens. Apertura 

 irregulariler lunaris, superne compressa, diagonaiis; peristoma 

 albido-labiatum, p.irum incrassatum, reflexiusculuni; marginibus 

 convergenlibus, callo tenui junctis, externo supra peripheriam 

 arcuato. Plicatio interna persimilis ci Helicis Pinacis et //. plecto- 



