MADEIRAN GROUP. 143 



lamella, and its surface is darker and of a more reddish-brown 

 hue, as well as less densely studded with hair-like lacinise, but 

 with the costate lines somewhat coarser and more apparent. 



From the H. fausta the capsella may be known by being a 

 trifle smaller and less globose (it being scarcely so convex as that 

 species, either above or below) by its keel being consequently less 

 decidedly rounded or obtuse, by its perforation not being wholly 

 closed-over by the reflexed margin of the peristome, and by its 

 aperture being a little less elongated and depressed, with the 

 lower lip free from any indication of an internal thickening or 

 corneous bi-sinuosity . 



The H. capsella was detected by myself and the late Rev. W. 

 J. Armitage, during 1 848, beneath stones, in a little dried-up gul- 

 ley on the southern slopes (towards the summit) of the Pico da 

 Silva, about four miles from Funchal, up the Caminho do 

 Meio, at an elevation of perhaps 3,500 feet ; and I also met with 

 it, in 1849, on the hills above Machico. It is recorded by the 

 Baron Paiva, likewise, from the vicinity of Sta. Anna and S. 

 Jorge, in the north of the island. 



Helix fausta. 



T. imperforata, obtuse conoideo-discoidea, obsolete subcari- 

 nulata, subtus inflato-convexa, tenuiuscula, subopaca, plus minus 

 pubescens aut hispida, utrinque tenuiter et indistincte costulato- 

 striata, fusco-cornea sed parce et irregulariter substrigoso-mar- 

 morata ; anfr. 5-J 6 convexiusculis, ultimo antice subito deflexo 

 et constrictiusculo ; apertura depressa, angusta, lunata; peri- 

 stomate interrupto, albido, expanso, sed acuto, marginibus 

 lamina tenui junctis, basali versus insertionem late expanso ad- 

 presso, intus quasi in dentem abrupte desinente. Long, maj. 

 2^-3 ; alt. 2 lin. 



Var. /9. robusta. Sensim major, ac paulo magis carinata, 

 quare subminus globosa. 



Helix fausta, Lowe, Cambr. Phil. S. Trans, iv. 43. t. 5. f. 8 



(1831) 



Pfei/., Mon. Hel. i. 422 (1848) 

 Lowe, Proc. Zool. Soc. Lond. 182 (1854) 

 Alb., Mai Mad. 39. t. 10. f. 1-4 (1854) 

 Paiva, Mon. Moll. Mad. 31 (1867) 

 Habitat Maderam ; ad rupes, vel submaritimas vel in casta- 

 netis sitas, versus insulae borealem. Rarissima. In statu semi- 

 fossili prope Cani^al invenitur. 



The H. fausta and obserata differ from the capsella and 

 arridens, amongst other particulars, in having their umbilical 

 perforation entirely closed over, or sealed, by the expanded edge 

 of the lower lip ; and as they are species which might be some- 



