32 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. CO 



nuclear whorls. Nucleus obliquely situated, whorls smooth, in- 

 flated, rapidly enlar<2:ing and slightly tabulated below the suture. 

 Postnuclear whorls distinctly set off from the nuclear whorls, both 

 axially and spirally sculptured, whorls strongly shouldered an- 

 teriorly and posteriorly. Axial sculpture of strong, slightly retrac- 

 tive, rounded, ititrasutural ribs (eighth on the penultimate whorl). 

 Spiral sculpture of (two on the first whorl and three on the second 

 whorl) wide-spaced cords overrunning the axials with equal strength 

 and occupying the periphery of the whorl: on the base and the 

 canal, there are 11 of these major spirals; aside froui these major 

 spirals, there are two spiral threads on the slope below the suture on 

 the penultimate whorl and three on the body whorl. Aperture wide 

 and slightly oblique; outer lip with a strong varix bordering the mar- 

 gin, within ornamented with six tubercles situated a little below the 

 margin: inner lip biplicate, the posterior plication much stronger. 



Dimensions: Type (U. S. Nat. Mus. Cat. Xo. 352663) measures: 

 Altitude 7.3 nun. ; greatest diameter 4 mm. ; length of aperture 3 mm. ; 

 width 1.6 mm. 



The species is represented by a single specimen. I find no close 

 relative to this new species. The species is named in honor of J. A. 

 Bullbrook. the collector. 



Occurrence. — Middle or lower Miocene: Guaico-Tamana Road, 

 2 miles east of mile 13 from junction with Eastern Main Road, 

 Trinidad. 



Genus PSEUDOLIVA Swainson 



PSEUDOLIVA GUPPYI, new species 



Plate 5, fig. 6 



Shell subovate, solid, rather low spired, one-fifth length of shell, 

 wdth four and one-half whorls in all. Last two and one-half whorls 

 quite strongly shouldered a little nearer the lower suture, behind 

 which the whorls slope rather steeply to the suture and in front are 

 nearly vertical. The upper whorls are rounded in outline. Suture 

 loosely appressed on the early whorls but grooved on the later whorls. 

 Apical one and one-half turns, smooth, polished, and semihemispher- 

 ical in outline. Sculpture on subsequent whorl begins with very fine 

 punctostriate spiral threads overspreading the first whorl and lying 

 behind the shoulder on the two remaining Avhorls. Broad and 

 elongate tubercles occupy the periphery of the last two whorls. Body 

 whorl marked with a distinct sulcus which encircles the whorl 

 shortly below the upper lip commissure on the body Avail to the lower 

 part of the outer lip. About twelve spiral plicate bands lie below this 

 sulcus. In addition to the above sculpture ornamentations, there are 

 rather indistinct, raised, narrow bands lying between the shoulder 

 and the sulcus on the body whorl, and irregular growth lines crossing 



