34 MOLLUSCA TERRESTRIA ET FLUVIATILIA 



Habitat frequens in lierbidis insiilae Maderae ad convalles Ribeira de J. Go- 

 mes, Ribeira de S.'" Luzia, in coliibus maritiniis aridis sub iapidilius ad Fajã da 

 Ovelha, Promontorium Garajáo, Pico da Cruz, Poiso, et in insula Deserta Aus- 

 trali. 



Variet. adest a minar, edentula, tenuior, subtiliter s. obsolete costulata, 

 perforatione ampiiore, peristomate minus reflexo, in rupium Qssuris degens prope 

 Calheta, Fajã da Ovelha. 



Helix arda, var. Alb. Mal. Mad. (úg. bona) 



Obs. Ab H.-lentiginosa Lowe, quacum interdum confundi potest, testa mi- 

 nore, magis compacta, radiatim costulata, lamellis paucis, compressis, opacis, 

 apertura minore, compressiore, fere sublriangulai'i, obliquiore, scrobiculata, 

 denticulo ventrali plerumque instructa, marginem pone sulcata, umbilico pun- 

 ctiformi, teslae basi minus profunde depressa certe dilfert. 



Species ita denominata quòd apertura intus denticulo quasi coarctata. 



Primúm a clariss. Rev/ Loweo inventa. 



26. ndix stellaris, Lowe 



Testa umbilicata, orbiculato-depressa s. discoidea, solidinscula, striatula, 

 fusco-cornea, obscure aibo-maiTOorata, plerumque nigricans, terra arcte obdu- 

 cta, squamulis hirsuta; spira depressa, ápice acutiuscula, nitens; sutura impressa; 

 umbilicus patulus, subspiralis; anfractus 4 convexiusculi, nltimus subcarinatus, 

 infra carinam convexus, membranaceo-calcaratiis, antice deflexus; apertura per- 

 obliqua, ovali-rotundata; peristoma circinafum, deorsum reflexum, marginibus 

 connivenlibus, incrassato-expansis.— Animal tiinidum, tardum, corpore nigres- 

 cente, loto tuberculis rotundatis, fuscescentibus, irregularibus infra vestito, fronte 

 subfusco, superioribus teníaculis cylindricis, fuscis, ápice subbulbosis, inferio- 

 bus supra fuscis, mediocribus, ápice globulosis, pede albido, poslice acutiusculo, 

 pallio albido, nigro-punctulato, pulposo, orifício respiratório parlim sphinctere 

 munito. 



Diam. maj. 4, min. 3, alt. 2 mill. 



Helix stellaris, Low. Syn. diagn. ; et Cat. moU. Mad. 

 " » Pfeif. Mon. helic. 



» » Reev. Conch. (lig. vix distincta) 



» lentiginosa, var. (3 Alb. Mal. Mad. (fig. bona) 



Habitat haud rara in insula Madera sub lapidibus, in rupium lissuris ad 



