38 TEST ACE A ATLANTIC A. 



Habitat Fayal (sec. Dunker) ; a D. Tarns sc. deprehensa. 



The Mediterranean B. solitarius (which is well distin- 

 guished from the ventricosus by its rather shorter or less pro- 

 duced spire, its more carinated basal whorl, and its larger and 

 more open umbilicus) was not met with at the Azores by either 

 Morelet or Drouet ; nevertheless it is stated by Dunker to have 

 been found commonly by Dr. Tarns in Fayal. 



Bulimus Santa-Marianus. 



Bulimus Sanctse-Mariae, Morel, et Dr., Joum. de Conch, vi. 



150 (1857) 

 Mouss., Viert. derNat. Zurich, 167 



(1858) 



Pfeiff.,Mon. Hel. iv. 474(1859) 



Santa^Marianus, Morel., Hist. Nat. des Acor. 194. 



t. 4. f. 6 (I860) 



Drouet, Faun. Acor. 163 (1861) 



(.status junior). 



Helix membranacea, Mouss., Viert. der Nat. Zurich, 165 

 (1858) 



Habitat Sta. Maria, et recens et semifossilis ; ad montem 

 Pico Alto sub lapidibus detecta. 



This is rather a short, broad, and inflated Bulimus, par- 

 taking more of the general contour of the B. ventricosus than 

 any of the following species ; and it is also thin and fragile, 

 semitransparent, of a corneous brown, but usually more or less 

 ornamented with a fascia of darker and paler ray-like, some- 

 times zigzag markings, which (although seldom quite obsolete) 

 is occasionally reduced to a narrow line, but which is far more 

 often so wide as to occupy nearly the whole breadth of the 

 penultimate whorl. Its peristome is whitish and very slightly 

 expanded, the columellary margin however being rather more 

 so, as well as a little dilated (at its point of insertion) over the 

 umbilical chink. 



The B. Santa-Jifarianus, which measures from about 10 to 

 1 3 millimetres in length, occurs in Sta. Maria, especially under 

 stones on the Pico Alto, where it is said to be abundant ; and 

 it was met with likewise in a subfossilized condition, in the 

 south of that same island. 



Bulimus Hartungi, 

 Bulimus Hartungi, Morel, et Dr., Journ. de Conch, vi. 151 



(1857) 



Mouss., Viert. der Nat. Zurich, 166 



(1858) 



