314 HELIX §. i29. 



2020. fallax Say. (Coll. 1074. — Bv. n. 686. t. 118. — 



Ulostoma Pfr. Vers. p. 135. — H. tridentata var. 

 Binn. Terr. Moll. II. p. 184. — Anchistoma fallax 

 Ad. Gen. p. 206.) Mon.m. p. 263. 



2021. Hopetonensis Shuttl. (Coll. 1075. — Shuttl. 



Diagn. Nr. 2. p. 18. — Bv. n. 709. t. 120. — Ch. 

 ed. nov. III. p. 420. — Ulostoma Pfr. Vers. p. 135. 

 — Anchistoma Hopetonense Ad. Gen. p. 206.) . . - - - 263. 



2022. H. helictomphala Pfr. 



T. umbilicata, depressa, solida, oblique costulala, nitidula, 

 pallide lutescenti-cornea; spira vix elevata; anfr. 5^^ convexius- 

 culi, ultimus anlice subdeflexus, supra medium subcarinatus, 

 basi inflatus, circa umbilicum '/3 "diametri fere aequantem, 

 scalariformem subcompressus , antice constrictus et scrobicu- 

 latus; apertura diagonalis, rotundato-Iunaris, dente linguaeformi, 

 sublibero parietis coarctata; perist. album, angulatim reflexum, 

 margine supero subhorizontali, dextro et basali acute uniden- 

 tatis. — Diam. maj. 12, min. IOV3, alt. SVg mill. (GoU. Nr. 1076.) 

 Helix helictomphala Pfr. in Proc. Zool. Soc. 1856. p. 377. 

 — — Pfi\ in Malak. Bl. 1856. p. 230. 



Habitat Chiapa reipublicae mexicanae (Ghiesbreght). 



2023. Yucatanca Mor. •{• [Anchistoma Yucatancum Ad. 



Gen. p. 206.) Mon. III. p. 263. 



2024. vultuosa Gould. {Gould in Binn. Terr. Moli. II. 



p. 189. t. 40^. f. 4. — Ch. ed. nov. III. p. 305. — 

 Ulosloma Pfr. Vers. p. 135. — Anchistoma vultuo- 

 sum Ad. Gen. p. 206.) - -- 263. 



2025. H. oppilata Morelet. 



T. umbilicata, depressa, tenuiter striata, subpellucida, 

 pallide cornea vel albida; spira vix elevata; anfr. 5 convexius- 

 culi, lente accrescentes, ullimus antice deflexus, basi inflatus, 

 pone aperturam constrictus; umbilicus angustus, pervius, extus 

 dilatatus; apertura diagonalis, lunato-circularis, ringens; perist. 

 breviter reflexum, marginibus dente linguaeformi, bicruri, in- 

 trante junctis, dextro subaequaliter bidentato. — Diam. maj. 7, 

 min. 6, alt. 3 mill. (Mus. Cuming. ) 



Helix oppilata Mor., Pfr. Mon. III. p. 264. n. 1550. 

 Anchistoma oppilatum H. et A. Adams Gen. II. p. 206. 

 p. Major, spira paullo elevatiore, anfr. ^V^; diam. maj. 8^31 niin. 7^/3, 

 alt. 4V3 niill. (Goll. Nr. 1077.) 

 Habitat Yucatan (Morelet); var. ^ in Florida (Shuttleworth). 



2026. Couloni Shuttl. f [Shutll. Diagn. Nr. 2. p. 17. — 



Anchistoma Couloni Ad. Gen. p. 206.) Mon.III. p. 264. 



