38 TEST ACE A ATLANTIC A. 



Habitat Fayal (sec. Dimker) ; a D. Tarns sc. depreliensa. 



The Mediterranean B. solitarius (which is well distin- 

 guished from the ventvicosus 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 Sanct^e-Marise, Morel, et Dr., Journ. de Conch, vi. 



150(1857) 

 „ „ Mouss.,Viert. derKat. Ziu'lch, 167 



(1858) 

 „ „ Pfeif., 3Ion. Hel.iv. 474: (1859) 



„ Santa-Marianus, Morel., Hist. Nat. des A<}or. 194. 



t. 4. f. 6 (1860) 

 „ „ Drouet, Faun. Agor. 163 (1861) 



(status junior). 



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

 (1858) 



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

 Pico Alto sub lapidibus detecta. 



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

 taking more of the general contour of the B. ventvicosus 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. Sarda-Marianus, 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 Hartuiigi. 

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

 (1857) 

 5, „ Mouss., Viert. der Nat. Zurich, 166 



(1858) 



