INSULARUM MADERENSIUM 73 



Sectio Plebeeula (Lowe, Albers) 



Testa umbilicata v. obtecle perforata, subglobosa, striata, granulata; anfra- 

 ctus 3-5 '/a convexi, ultimiis antice vix deflexus; apertura rotnndata; peristoma 

 simplex, intus dilTuso-callosum, marginibus approximatis, columellari reflexo, 

 expanso. 



67. Helix Bowdichiana, Fòrussac 



Testa obtecte perforata, globosa, striata, rugulosa, confertim granulata, 

 crassa, quasi calcarea; spira convexa; sutura distiricla; anfractus 5Y2-6 con- 

 vexi, ultimus globosus, inflalus, antice deflexus; apertura obliqua, rotundato- 

 lunaris; peristoma intus callosura, marginibus caiio junctis, dextro arcuato, ba- 

 sali recto, columellari dilatato. — Animai non licuitexaminare, quòd hodie lantúm 

 fossilis testa nec recens. 



Diam. maj. 20-22, min. 17-18, alt. 19 mill. 



Helix Bnwdichiana, Fèr. Hist. 

 » Vargariana, Pfeif. in Proced. Zool. Soe. 

 » punctulata, var. y Pfeif. Mon. Iielic. 

 » Bowdicliiana, Alb. Mal. Mad. (fig. óptima) 

 » » Low. Cat. moU. Mad. 



Fossilis reperitur in insula Portosancto frequens ad Zimbral d'Aréa. 



Var. X semifossilis, peristomate minus incrassato, testa tenuiore, laevigata, 

 pelluoida, haud foveolata, ad Zimbral d'Aréa rarior. 



Obs. H.-punctulatae Sow. vnlde próxima; testa vero majore, globosiore, 

 magis compacta, margine columellari crasso-calloso, scuiptura rudiore, anfra- 

 ctibus numerosioribus differt. 



Obs. Quamquam clariss. Wollastonus (in litt.), Pfeifferus, Rev.** Loweus me- 

 ram varietatein ll.-punclulatae Lowe existiment, milii tamen species distiiicta vi- 

 detur ob diversum anfractnuni numerum, peristomatis marginem columellarem 

 valde incrassalum, testam ampliorem. 



Seclionis denoininalio quoad ethymniogiam ignota. 



Species sic dicla, quòd clariss. Bowdicho dicaía. 



Clariss. Bowdichus invenit priraus? 



68. Helix punctulala, Sowerbv 



Testa obtecle umbilicata, suhglnbosa, ecarinata, coffaeacea s. flavo-fusca, 

 concentrice slriata s. lineata, setulis ligidis, fugacissimis aspersa, scabro-granu- 



»1EM. DA ACiVD. — 1.^ CLASSE. T. IV, l'. I. 10 



