122 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Solarium species. 

 (Plate 4, Figure 10.) 



From Crocus Bay, Anguilla, there are two specimens of Solarium. 

 The smaller, which is figured, is a fragment of 3| whorls from station 

 6965. The upper surface is ornamented with a sculpture of radiating 

 and revolving lines, as in S. bellastriatum; the lower surface is embedded 

 in a matrix of hard, yellow limestone. The larger specimen is 23 mm, 

 in diameter. The sculpture, except for prominent revolving lines on 

 the upper surface, is obliterated. The suture is deeply impressed. 



Locality. Crocus Bay, Anguilla, stations 6965 and 6967, Vaughan. 



Geologic horizon. Oligocene. 



Figured specimen. U. S. Nat. Mus. No. 167015. . 



Bythinella antiguensis Brown and Pilsbry. 



Bythinetta antiguensis Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 212, text-fig. 1, 

 1914. 



The following is the original description of this species: 



"The shell is oblong, pupiform, smooth; outlines of the spire convex, the 

 apex conspicuously obtuse. Whorls 4, very convex, aperture vertical, shortly 

 ovate, its length contained 2\ times in that of the shell; peristome in one plane, 

 thin. 



"Length 1.8, diam. 1.1, length of aperture 0.7 mm. 



"This very minute form is not rare. It has the very obtuse summit and the 

 pupiform shape of the species usually referred to Bythinella, rather than the 

 shape of Paludestrina, if, indeed, the two groups are distinct. Of course, any 

 generic reference of a minute Amnicoloid shell of this sort is purely provisional, 

 unless it is from a region where the recent fauna and its antecedents are well 

 known." 



Locality. Dry Hill, Antigua, Brown. 

 Type. Philadelphia Academy. 



Xenophora species. 



A species of Xenophora with very convex, closely appressed whorls 

 showing few scars of attachment is abundant in the Oligocene of 

 Crocus Bay, Anguilla (stations 6893, 6894, 6966, 6967). An indeter- 

 minable cast of a Xenophora was collected from the upper Eocene on 

 the northwest side of St. Jean Bay, St. Bartholomew, station 6925, 

 Vaughan, collector. 



Genus ELMIRA, new genus. 

 The following is a description of this genus: 



Shell rapidly increasing in size; whorls few, rapidly descending; holostome; 

 imperforate. 



Genotype. Elmira cornu-arietis Cooke, n. sp. 



This genus appears to belong to the Paludinidse, but has fewer whorls 

 and is much more rapidly expanding than the other members of that 

 family. 



