NO.1110. PROCEEDINGS OF THE NATIONAL MUSEUM. 323 



Ditrupa bed, Pointapier, Triuidad, Guppy (2256). Ko. 107148, 

 U.S.KM. This is almost certainly identical with one of the small 

 recent species, but the material is too meager for a positive decision on 

 that point. 



MICROGAZA ROTELLA, Ball. 



M. rotella, Dall, Blake Gastr. Bull. Mus. Conip. Zool., XVIII, p. 357, pi. xxii, 



figs. 5, 5a (1881), 1889. 



Keceut in 70 to 805 fathoms in the Antilles. Fossil in the Oligocene 

 of Bowden, Jamaica, Henderson and Simpson. Nos. 04904 and 107457, 

 U.S.N.M. 



This elegant and curious little shell is common in the Bowden marl 

 and exactly agrees with the recent specimens with which it was com- 

 pared. The variety inornata, Dall, was found with the typical form in 

 the marl as in the sea. 



DILLWYNELLA ERRATA, Guppy, new species. 

 (Plate XXVII, fig. 2.) 



Subglobose turbinate, shining, smooth, or marked by obsolescent 

 undulate lines of growth; whorls 3-4, rapidly increasing, somewhat 

 compressed or flattened superiorly; aperture circular, eflused below 

 into a sort of expanded and channeled columellar lip ; spire little ele- 

 vated. Alt. 1.5, lat. 1.8 mm. [G.] 



Ditrupa bed, Pointapier, Trinidad, Guppy (2126). No. 107135, 

 U.S.N.M. This genus is now known to extend from the Claibornian 

 Eocene to the recent fauna. 



SOLARIORBIS CLYPEATUS, Guppy, new species. 

 (Plate XXVII, fig. 3.) 



Depressed, scarcely conoidal; whorls about 3, flattened, lineated by 

 fine spiral ribs, which are crossed by fine radiating lines of growth; 

 margin of whorls strongly but somewhat sharply carinated, the keel 

 being a round rib marked off from the whorl by a line; umbilicus 

 small; base covered with revolving and radiating lines like those of 

 the upper surface, but finer; apex smooth. Alt. 1.75, lat. 3 mm. |G.] 



Oligocene of Jamaica, Yendryes (Guppy, 2134). No. 107075, U.S.N.M. 



CALLIOSTOMA ASPERRIMUM, Dall. 

 C. asperrimum, Dall, Bull. Mus. Comp. Zool., XVIII, p. 373 (1881), 1889. 



Kecent in the Antilles, 100 to 220 fathoms, Blake expedition. Oligo- 

 cene of Jamaica, Vendryes (Guppy, 2293a). No. 107097, U.S.N.M. 



CALLIOSTOMA PULCHER, C. B. Adams. 

 C. pulcher, Adams, Contr. ("oncli., p. 69, 1850, not of A. Adams, 1851. 



Recent in the Antilles. Oligocene of Jamaica, Vendryes (Guppy, 

 2293b). No. 107096, U.S.N.M. 



