AZOREAN GROUP. 47 



(or less short and ventricose), and with its surface a little more 

 roughened, though its costse (which are slightly more numerous 

 and regular) are nevertheless not quite so coarse. Its aperture, 

 too, is relatively a trifle smaller, and (according to the diagnosis) 

 is provided with only three plaits, two of which are ventral 

 (the outer, or larger, one being connected with the angle of the 

 lip by a corneous sphincter), and the third one on the middle of 

 the columella. In the figure, however, there would seem to be 

 indications of a fourth one, on the palate ; but this perhaps 

 may be merely accidental. 



The P. rugulosa is apparently unique, the single example 

 which served Morelet as a type having been found by Drouet in 

 a garden, in company with the H. paupercula, Lowe, on the 

 western coast of Pico. 



Pupa vermiculosa. 



Pupa vermiculosa, Morel., Hist. Nat. des Acor. 201. t. 5. 



f. 4 (I860) 

 Drouet, Faun. Acor. 166 (1861) 



Habitat S. Miguel ; in montibus juxta lacum ad Las Furnas 

 parce lecta. 



As already implied, the present Pupa is a trifle smaller 

 and more ovate than the P. rugulosa, and its costse are rather 

 wider apart, at any rate on the ultimate and penultimate 

 whorls, where they have also a slight tendency to be flexuose or 

 vermiform. Its aperture is said to be armed internally with 

 four plaits (instead of only three) ; but the fourth one cannot 

 be very conspicuous or well defined, seeing that a different 

 situation is assigned to it by Morelet and Drouet, the former 

 citing it as (small and ' punctiform ') on the ventral wall, to 

 the left of the usual large and prominent one ; whilst Drouet 

 speaks of it as on the ' bord externe ' (or palate), in which case 

 (according to him) there is only ' 1 sur la paroi superieure,' 

 i.e. on the ventral paries. I doubt, therefore, if the aperture 

 can be regarded strictly as more than 3-plicate. 



The P. vermiculosa was met with in S. Miguel, at the base 

 of the mountains which adjoin the southern border of the lake 

 in the valley of the Furnas. 



( Staurodon, Lowe.) 



Pupa pygmaBa. 



Pupa pygma3a, Drap., Tabl. d. Moll. 57 (1801) 

 Vertigo pygmasa, Gray, Man. 201. t. 7. f. 83 (1840) 

 Pupa pygmsea, Pfei/., Mon. Hel. ii. 362 (1848) 

 Morel., Hist. Nat. des Acor. 206 (1860) 



Drouet, Faun. Acor. 167 (1861) 



