546 TEST ACE A ATLANTIC A. 



tlie Sidepatli Road (between Jamestown and Longwood) over- 

 looking the ' Briars.' 



Bulimus Seleianus. 



Bulimus Seleianus, Forbes, Journ. Geol. Soc. Lond. viii. 

 198. t. 5. f. 3 (1852) 

 „ „ Pfeiif., Mon. Hel. iv. 506 (1859) 



„ „ Meliiss, St. Hel. 122 (1875) 



Habitat in iisdem locis ac prsecedens ; semifossilis. 



The only points in Prof. Forbes' diagnosis of this Bulimus 

 which would at all distinguish it from the B. helena are (1) its 

 more thickened substance, and (2) the fact that no mention is 

 made of the existence on its surface of spiral lines ; but the 

 former of these might have been merely due to the longer pro- 

 cess of subfossilization to which the shell had been exposed, 

 whilst the latter (or the obliteration of tlie spiral costse) may 

 have been the result of the selfsame cause, — the destruction of 

 the outer cuticle having been naturally more complete. Still, 

 judging from the figure, the B. Seleianus would appear to be a 

 trifle smaller and less ventricose than the B. helena, with the 

 aperture a little narrower and less developed ; and its peristome, 

 which is much more incrassated, has the upper and lower por- 

 tions connected by a more robust lamina. It seems to have 

 been described from a specimen which was found by Mr. E. 

 Alexander. 



Bulimus Blofeldi. 



Bulimus Blofeldi, Forbes, Journ. Geol. Soc. Lond. viii. 198. 

 t. 5. f. 2(1852) 

 „ „ Pfeif., Mon. Hel. iv. 506 (1859) 



„ „ Melliss, St. Hel. 122 (1875) 



„ helena ? Reeve [nee Q. et G.^, Conch. Icon. f. 306 



Habitat ins. St. Helenge, semifossilis ; ad latera vise inter 

 Jamestown et Longwood, circa 1200' s. m., reperta. 



Judging from the diagnosis and plate, which are given by 

 Prof. Forbes, the present Bulimus (which is nearly an inch in 

 length) ranges next, in point of size, to the B. auris-vulpina 

 and Darwinianus ; nevertheless it belongs to a very different 

 type, — being altogether less solid, and having no thickenings or 

 developments about its aperture. It is indeed more on the 

 pattern of the three preceding species, but is larger than any of 

 them, and has its columella longer and straighter ; and the 

 upper and lower divisions of its peristome (which is said to be 

 acute) are unconnected by an intervening lamina. Still, the 

 example figured having been an exceedingly imperfect one, I 



