HELIX §. 32. 91 



558. alternata Say. (Coll. 241. — Binn. Terr. Moll. 11. 

 p. 212. t. 25 et Leidtj ib. I. t. 7. f. 5. — llv. 

 n. 670. t. H6. — Patula Pfr. Vers. p. 126. — 

 Hel. scabra Lam., Desh. in Enc. m6th. 11. p. 219. 

 n. 33. — H. radiata Gm. — H. dubia M'Cull. 

 teste Binn. 1. c. I. p. 162. — Discits alternattis 

 Ad. Gen. p. H7.) Mon. III. p. 9S. 



559. H. strongylodcs Pfr. 



T. umbilicata , convexo-clepressa, solida, oblique costulata, 

 albida, maculis rufis superne variegata; spira parum elevata, 

 obtusa; anfr. 6 sensim accrescentes, primi planiusculi, sequentes 

 convexi, ad suturam tumidi, ultimus non descendens, teres; 

 umbilicus perspectivus, y^ diametri aequans; apertura diago- 

 nalis, lunato-rotundata; perist. simplex, rectum, margiuibus 

 subconvergentibus, columellari superne fornicatim patente. — 

 Diam. maj. 19, min. ICya, alt. 8V2 mill. (Mus. Cuming.) 

 Helix strongylodes Pfr. in Proc. Zool. Soc. 1854. p. 53. 



— — Reeve Conch. ic. n. 1296. t. 186. 



— — (Patula) Pfr. Vers. p. 126. 



Habitat in Texas. 



Obs. Dififert ab H. alternata anfraclibus turgidis, aperturae directione 

 et forma, etc. 



560. H. strigosa Gould. 



T. umbilicata, subturbinato-depressa, solidula, irregulariter 

 costulato-striata , vix nitidula, albida, fusco-corneo variegata, 

 fasciis variis fuscis cincta; spira breviter conoidea, obtusula; 

 anfr. 5 convexi, superi carinato-raarginati, ultimus rotundatus, 

 obsoletissime angulatus, antice breviter descendens; umbilicus 

 apertus, fere y^ diametri occupans ; apertura diagonalis, lunato- 

 circularis; perist. simplex, rectum, marginibus approximatis, 

 callo junctis. — Diam. maj. 21, min. 18, alt. 10 mili. (Mus, 

 Cuming. ) 



Helix strigosu Gould Exped. Sh. t. 3. f. 41. 



— — Pfr. Mon. Hel. III. p. 113. n. 321. 



— — Pfr. in Malak. Bl. IV. 1857. p. .32. 



— — Gould in Binn. Terr. Moll. II. p. 210. t. 26. 

 Iherus strigosus (Gampylaea) H. et A. Adams Gen. II. p. 211. 



Habitat Oregon (Gould), «Rocky Mountains» in Nova Mexico. 



561. H. anfecta Parreyss. 



T. umbilicala, conoideo-depressa, tenuiter costulato-striala. 

 corneo-albida, rufulo obsolete fasciata etradiata; spira conoidea, 

 vertice subtili; anfr. 6 convexiusculi, lente accrescentes, ultinuis 

 antice non descendens, peripheria obsolelissime angulatus; um- 



