60 PROCEEDINGS OF THE NATIONAL MUSEUM vol.66 



Dimensions: Type and only specimen (U. S. Nat. Mus. Cat. No. 

 352687) measures: Altitude 6 mm.; greatest diameter 6.5 mm. 



Occurrence. — Lower Miocene: Nariva County, Charuma Ward, 

 Machapoorie Quarry, Trinidad. 



Genus TEINOSTOMA A. Adams 



TEINOSTOMA (PSEUDOROTELLA ?) CARONENSIS, new species 



Plate 8, figs. 9, 11 



Shell small, solid, subhemispherical, three and one-half whorled 

 and consists largely of the last whorl; whorls inflated; suture dis- 

 tinct but shallowly depressed on spire whorls, and closs-fitting 

 and less distinct on body whorl; periphery of body whorl rounded^ 

 base slightly rounded. Sculpture on last whorl of close-set, micro- 

 scopic, spiral striae, being less distinct on the base. Aperture sub- 

 ovate, narrowly and shallowly grooved and pointed at the upper 

 commissure. Umbilical area nearly filled with a heavy wash of cal- 

 lus, transgressing only a little beyond the center of the base. Margin 

 of the inner lip" indistinct. 



Dimensions: Type and only specimen (U.S. Nat. Mus. Cat. No. 

 452690) measures: Altitude 1.4 mm.; greatest diameter 2.2 mm. 



The new species recalls Teinostoma vitreuni (Gabb) collected from 

 Santo Domingo, the horizon of which has not been determined, but 

 when compared with Gabb's figured type, the new species has little 

 higher and more domed spire and less constricted whorls and the 

 margin of the inner lip much less distinctly set off. 



Occurrence. — Caroni County, Montserrat Ward, Brasso-Gran 

 Couva Road, 100-200 yards west of Brasso, TrinidacL Fossiliferous 

 clay immediately overlying the Turritella-bearing limestone. 



Genus ADEORBIS S. Wood 



ADEORBIS GUPPYI, new species 



Plate 10, figs. 1, 3 



Shell fragile, subdiscoidal, spire nearly flat, about four whorled, 

 one-third of last whorl broken off; body whorl with two widely 

 separated spiral carini, the upper one high and thin, and situated 

 near the middle of the whorl forming the periphery, the lower one 

 less prominent and marginates the flat base ; area between the carini 

 straight and anteriorly sloping; area in front of the suture de- 

 pressed. Nucleus smooth; initial turn minute. Subsequent whorl 

 sculptured with three raised primary spiral threads; one is at the 

 upper shoulder, another at the lower shoulder, and the intermediate 



