CAN AM AN GROUP. 441 



one which is more particularly characteristic of Gomera, where 

 it abounds beneath stones on the rocky slopes above San 

 Sebastian, I also met with it (more sparingly) in Hierro like- 

 wise, — from whence, however, the only quite matured example 

 which I possess (and which I would cite as representing a 

 ' var. /3. subsimplex ') differs from the Gomeran ones in being 

 a trifle smaller, and in having the intervening callosity which 

 unites the margins of its peristome (which may possibly be 

 the result of mere accident, or individuality) obsolete. 



The B. Bertheloti has very much the cylindrical contour 

 and flattened volutions of the Grand-Canarian B. interpunc- 

 tatus (with the rather more papilliform apex, however, of the 

 B. obesatus of that same island), of which indeed it may be 

 looked upon as the Gomeran representative. Nevertheless it 

 is a considerably larger shell, its surface is more shining, very 

 much more finely and lightly sculptured (the striee moreover 

 being almost simple, and in certain places nearly evanescent), 

 and of a paler, clearer, and whiter hue ; and the margins of 

 its peristome are generally united by a somewhat line-like 

 callosity, which is apt to be interrupted in the centre, but 

 which is thickened at the upper insertion into a usually dis- 

 tinct tubercle, — which is separated from the angle itself (as 

 in the B. helvolus, badiosus, and Conseeoanus) by a minute 

 incision or gash. Its suture (except towards the apex) is ex- 

 tremely superficial, and often a little uneven or lacerated 



Bulimus savinosa, n. sp. 



T. (magna) rimata, late ovata, inflatiuscula, nitidiuscula, 

 dense striatula (striis in anfr. posterioribus fere simplicibus, 

 sed in subapicalibus subgranulatim fractis), pallide olivaceo-cor- 

 nea ; spira semiovali-conica, ad apicem ipsum prominulo- 

 subjiapilliforrni • anfractibus 8, planis ; apertura latiuscula, 

 rotundato-subovali, peristomate albo, late expanso, acuto, mar- 

 ginibus late separatis et lamina subnulla junctis, inter se 

 rotundate (nee angulatim) continuis, columellari late reflexi- 

 usculo ; columella breviuscula, lata, curvata, subsinuata. — 

 Long. lin. 10^ ; diam. maj. 5\. 



var. ft. inflatiusculus [an species distincta ?]— anfractibus 

 7, in spira subconvexioribus, apertura vix longiore, peristo- 

 mate subcrassiore sed tamen minus late expanso, marginibus 

 paululum minus distantibus et callo sensim distinctiore junc- 

 tis, columellari minus reflexo, columella sensim minus lata. 

 [ins. Gomera.] 



Habitat Gomeram, et Hierro, rarissime ; in ilia statum ' ft, 

 inflatiusculus ' assumens. 



