TESTACEA ATLANTIC A. 



Subulina subplicata. 



Cochlioopa subplicata, Sow., in Darwin's Vole. Id., Append. 



156 (1844) 

 Achatina subplicata, Forbes, Journ. Geol. Soc. Load. viii. 



197 (1852) 

 Bulimus subplicatus, Id., ibid. 199. pi. 5. f. 6 (1852) 



„ et Achatina subplicata, Melliss, St. Hel. 122, 123 



(1875) 



Habitat ad latera via? ' Sidepath ' dictge, inter Jamestown et 

 Long-wood, semifossilis ; hodie recens baud obvia. 



Like tbe following one, the present species is subfossilized 

 and apparently extinct, occurring in the surface soil on the side 

 of the hill overlooking the Briars — in a cutting of the road 

 leading from Jamestown to Longwood. According to Mr. J. H. 

 Blofeld it would seem to exist equally in the direction of Flag- 

 staff; inasmuch as he particularly mentioned (Quart. Journ. 

 Geol. Soc. viii. 196) that he met with it in company with the 

 Bulimus auris-vulpina, — which latter does not occur near the 

 Briars, but is essentially characteristic of the district, or ridges, 

 between the conical hills which are known as Flagstaff and 

 Sugarloaf. 



The S. subplicata, judging from its published figure, does 

 not appear to differ greatly from the S. terebellum, — the two 

 forms belonging to precisely the same type. It is however a 

 little smaller than the latter (measuring about 7 lines in length), 

 and there are faint indications of posteriorly-abbreviated longi- 

 tudinal plicae (adjoining the suture) on the anterior zone of 

 each whorl. Being subfossilized of course nothing can be said, 

 in the case of either species, as regards colour. 



Subulina terebellum. 



Cochlicopa terebellum, Sow., in Darwin's Vole. Isl., Ap- 

 pend. 156 (1844) 

 Achatina terebellum, Forbes, Journ. Geol. Soc. Lond. viii. 



197, 198 (1852) 

 Bulimus terebellum, Id., ibid. 199. t. 5. f, 5 (1852) 

 „ „ Melliss, St. Hel. 122 (1875) 



Habitat in locis similibus ac prsecedens ; semifossilis. 



Judging from the figure of this species which accompanies 

 the late Prof. E. Forbes' paper in the ' Quarterly Journal of the 

 Geological Society,' the subfossilized ' Cochlicopa terebellum ' 

 of Sowerby is, unless I am much mistaken, like his G. subpli- 

 cata, a decided Subulina, — its elongate-conical outline and 

 shortened aperture, in conjunction with the manifest keel across 



