52 MOLLUSCA TERRESTRIA ET FLimATILIA 



44. Helix s|)irorbis, Lowe 



Testa umbilicata, párvula, depresso-leiíticularis, planiuscula, tenuis, fusca, 

 supra granulata, confertim striatula, fere unicolor, fasciis evanescentibus; spira 

 planato-depressa, ápice obtusa; sutura impressa: umbiliciis amjjlus, patulus, 

 perspectivus; anfractus 5 convexiusculi, ultimus obsoleto aiigiilato-carinalus, an- 

 tice vix (leflexus, aperturam versus subgranulatus; apertura obliqua, ovato-ro- 

 tundata; peristoma subexpansum, álbum, undi(pie subsolutum. — Animal elonga- 

 tum, gracile, haud timidum, coipore aibo, pellucido, dorso caeruiesceiite, fronte 

 caeruleo, superioriljus teiitaculis cylindi'icis, caerulescentibus, ápice bulbosis, in- 

 ferioribus brevissimis, caeruleis, pede albo, antice obtuso, postice acutiusculo, 

 Iiallio albo. 



Diam. maj. o, min. 4, alt. 2 ','2 mill. 



Helix spirorbis, Low. Syn. Diagn.: et Cat. moU. Mad. 



» Maderensis var 5 Pfeif. Mon. helic. 



» » « Alb. Mal. Mad. (tig. bona) 



Habitat copiose sub lapidilius prope Paul do Mar ad radicem promontorii 

 Girão, ad Fajã dOvdha, rarior in insula Deserta Australi. 



Obs. Quamquam clariss. Pfeiffero, Wollastono (in litt.), Albersio mera va- 

 rietas H.-maderensis videatur, Loweanam speciem cum clariss. Watsono servan- 

 dam censeo, qiiòd testa valde minore, tola granulata, magis discoidea, spira 

 depressiore, sutura magis profunda, carina obtusiore, umbilico majore, magis 

 profundo, peristomate nec omniiio soluto sat discernitur. 



Obs. H.-leptostictae Lowe i)ruxima: testa tamen depressiore, graciliore, 

 umbilico ampliore, granulationibus irregularibus, grossis diílert. 



Species sic dieta a genere Spirorbis. 



Primus invenit clariss. Rev.'' Loweus. 



(c) TESTA TURBINATO-DEPRESSA 



45. Helix Ifploslicta, Lowe 



Testa umbilicata, conoidea, rotundata, flavo-cornea, tenuis, ruguloso-striata; 

 spira convexo-depressiuscula; sutura distiucta; umbilicus patulus, s])iralis; an- 

 fractus ri -5 '/a convexi, minute reticulato-granulali. ultimus obtuse carinatus, 

 subangulalus, obsolete fasciatus, basi exiliter granulatus, aniice breviter defle- 

 xus; apertura diagonalis, rotundata; peristoma albo-subincrassatum, marginibus 

 callo junctis, basali reflexiusculo. — Animal valde timidum, pigrum, corpore sor- 



