INSULARUM MADERENSIUM 95 



Varietates adsiint, 



a testa pallido-cornea, sparsim granulata, fusco-fasciata, anfractu ultimo 

 basi convexo, antice vix descendente, apertura subcirculari. 

 Subvar. I testa eíasciata, immaculata, virescenti-citrina. 



Helix Albersii, Low. Syn. Diagn. 

 ' » Bulwerii, var. (5 Pleif. Mon. helic. 



» » » 7 Alb. Mal. Mad. (fig. óptima) 



» Albersii, Low. Cat. moll. Mad. 



cum forma typica commixta degit, ast rarior. — Animal tardum, timidum, corpore 

 albido-fusco, dorso tuberculis oblongis, albidis asperso, fronte albido-luteolo. 

 maculis fuscis, longitudinal ibus notato, superioribus tentaculis cylindricis, basi 

 crassiusculis, ápice bulbosis, inferioribus brevissimis, fuscescentibus, pede lutes- 

 centi-albido, antice obtusiusculo, postice acuto, pallio albido, punctulis fuscis 

 asperso, partim submerso, orifício respiratório sphinctere albo, crassiusculo cir- 

 cumdato. 



(3 major, spira altíssima, prope N. Senhora da Graça; raríssima. 



Obs. Quamquam varietas x clariss. Rev.'' Loweo species distincta videatur 

 ol) testam minorem, trochiformem, cerino-corneam, basi convexiorem, carinam 

 minus prominentem, apertaram obsoletius angulatam, clariss. Pfeifferi, Albersii, 

 Wollastoni (in litt.) secutus sententiam tantúm meram varietatem H.-Bulweria- 

 nae Lowe habeo. 



Species a clariss. Bulweri nomine sic dieta. 



Primus invenit clariss. Rev.'' Loweus. 



(b) TESTA UMBILIGATA, SUPRA PLANATA 



87. Helix tabellata, Lowe 



Testa umbilicata, plano-discoidea, perdepressa, tenuis, supra planíssima, 

 rugiilosa, grossiuscule granulata, corneo-fuscescens fusco-albo-marmorata; spira 

 tabellato-planata; sutura distincta; umbilicus pntulus, declivis; anfractus 3-5 72 

 plani, lente crescentes, quasi attriti, ultimus supra acute carinatus, carina su- 

 pera, antice vix descendens, basi convexiusculus, pallidus, fusco-unifasciatus; 

 apertura perobliqua, rotundato-lunaris; peristoma siraplex, marginiuus subcon- 

 tiguis, callo tenuissimo junctis, basali reflexiusculo, subarcuato, supero recto. 

 — Animal velox, non timidum, corpore sordide albido, subtiliter fusco-mamil- 

 lato, coUo dorsoque fusco-tuberculatis, fronte nigrescente, macula fusca médio 

 notato, mamillato, superioribus tentaculis lanceolatis, supra lividis,- ápice clava- 



