mSULARUM MADERENSIUJI 



Helix armillala, Alb. Mal. Mad. (fig. bona) 

 » » Mor. Hist. Nat. des Azor. 



69 



Habitat frequens in insulis Azoris; haud rara in insulae Maderae iimbrosis 

 caulibus herbarum adhaerens, in lapidiim foraminibus ciim Piipis sodalis ad La- 

 zaretum prope Funclialensem iirl)em, in monte Pico da Cruz; semifossilis in 

 aridis prope Custcllo do Pico super terram. 



Obs. H.-lentiginosae Lowe partim análoga: umbilico tamen pervio, peristo- 

 mate oranino simpiici, testa ochraceo-albida dilíert. 



Obs. Ab H.-sIriata Drap., cui próxima, testa minore, deprcssiore, umbilico 

 amplioi-e, anfiaclibus magis convexis, sutura valde profunda, peristomale sim- 

 piici nec intus costato-annulato discernitur. 



Sectio sic denominata, ijuòd in coliinis et terris aridis maxime gaudent spe- 

 cies. 



Species ita dieta ob testam moniliformes glóbulos quodammodo referentem. 

 — Ab affinibus certe distincla. 



Primus clariss. Rev.'' Loweus invenit in insula Madera. 



C;j. Helix Miciíaiidi, Deshayes 



< Testa perforata, trodioideo s. globuloso-conoidea, ruguloso-slriata, lusco- 

 albida, nilens, seriatim maculata v. fasciis castaneo-nigrescentibus festive ornata; 

 spira elatiuscula, ápice obtusa; sutura distincta; perforatio augusta, rimaefor- 

 mis; anfractus 7 planiusculi, ultimus subangulato-carinatus, basi vix convexus, 

 antice haud deflexus; apertura transverse depresso-lunaris, lata, subangulata; 

 peristoma acutum, intus labiatum, marginibus remolis, columellari brevi, refle- 

 xiusculo, perforationem fere tegente. — Animal haud timidum, velox, corpore 

 albido, albis mamillis asperso, doiso tuberculis promiuentibus, nigris, elliptico- 

 lanceolatis consperso, fronte submamillato, partim fusco-maculato, superioribus 

 tentaculis cyUndricis, plumbeo-griseis, basi incrassatis, ápice bulbosis, inferiori- 

 bus brevibus, nigrescentibus, ápice obloiigo-bulbosis, pede lutescente, postice 

 acutiusculo, antice obtuso, pallio plumbeo-collaeaceo, oriricio respiratório sphin- 

 ctere semilunari munito. 



Diam. maj. 7, min. 6, alt. 4 "2 mill. 



Helix Michaudi, Desh. in Encycl. Meth. 

 » bicolor, Lowe Piim. (fig. bona); et Cat. moU. Mad. 

 » Michaudi, Pfeif. Mon. lielic. 

 » » Reev. Conch. (flg. bonaj 



» » Alb. Mal. Mad. (fig. bona) 



