UELIX §. 32. 91 



558. altcrnata Say. (Coll. 241, — Dinn. Terr. Moll. II. 

 p. 21-2. t. 25 et Leidy ib. I. t. 7. f. 5. — lic. 

 n. 670. t. 116. — Palula Pfr. Vers. p. 126. — 

 Hel. scabra Lam., De.sli. in Enc. m6tli. II. p. 219. 

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

 teste Binn. 1. c. I. p. 162. — Discus allernatus 

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



559. H. strongylodcs Pfr. 



T. umbilicata, convexo-depressa, solida, oblique coslulata,, 

 albida, maculis rufis superne variegata; spira parum elevata. 

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

 convexi, ad suturam tumidi, ultimus non descendenSj teres; 

 umbilicus perspectivus, y^ diametri aequans; apertura diago- 

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

 subconvergentibus, columellari superne fornicatim patente. — 

 Diam. maj. 19, min. IGy^, alt. Sy^ 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. 



Habilat in Texas. 



Obs. Differt ab H. alternata anfractibus turgidis, aperturae directione 

 et forma, etc. 



5S0. H. strlgosa 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-marginati, ultimus rotundatus, 

 obsoletissime angulatus, antice breviter descendens; umbilicus 

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

 circularis; perist. simplex, rectum, marginibus approximatis, 

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

 Cuming,) 



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



— — Pfr. Mon. Hel. III. p. 113. n. 521. 



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



— — Gould in Binn. Terr, Moll. H. p. 210. t. 26. 

 Iberus strigosus (Carapylaea) H. et A. Adams Gen. II. p. 211. 



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



561. H. infccta Parreyss. 



T, umbilicata, conoideo-depressa, tenuiter costulato-striala, 

 corneo-albida, rufulo obsolete fasciata et radiata; spira conoidea, 

 vertice subtili; anfr, 6 convexiusculi, lente accrescentes, ultimus 

 antice non descendens, peripheria obsoletissime angulatus; um- 



