46 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. CO 



Genus ALECTRION Monfort 



, ALECTRION BRASSOENSIS. new species 



. Plate 7, fig. 3 



Shell small, solid, acute, with three nuclear and three and one-half 

 postnuclear whorls. Apical turn minute and papillose. Following 

 nuclear whorls broadly conical, smooth, and inflated. Periphery of 

 postnuclear whorls situated well forward and marginating the de- 

 pressed presutural area of the following whorl; body whorl broadly 

 rounded. Suture undulated and shallowly grooved. Axial sculp- 

 ture of about twelve strong, rounded ribs extending from suture to 

 suture on the spire and to the siphonal fasciole on the body whorl. 

 Spiral sculpture of two to three close-set threads adjacent to and in 

 front of the suture ; four stronger, equally spaced threads extend for- 

 ward to the periphery of the whorl; and two small threads lie within 

 the depressed presutural area. Body whorl with about twelve major 

 spirals. All spirals overrun the ribs and valleys with nearly equal 

 strength. Aperture ovate. Outer lip with a strong varix; within, 

 ornamented with five or six long lirae alternating near the margin 

 with small denticles. Inner lip with a wash of callus, marked by 

 two lirae on the body wall and roughened at its lower border. 

 Canal short, reflected and slightly expanded anteriorly. Siphonal 

 fasciole marked with six spirals. 



Dimensions: Type (U. S. Nat. Mus. Cat. Xo. 352668) measures: 

 Altitude 5.2 mm. ; greatest diameter 3.4 mm. 



Occurrence. — Middle or lower Miocene : In flood-wash, station 9212, 

 Caroni County. Montserrat Ward, 1 mile south of Brasso. ? Occurs 

 also at station 9197. 



The new species differs from Maury's species, Alectrion cercadensis^ 

 in having fewer and stronger spirals on the body whorl. Alectrion 

 cercaderiMS appears to be confined to the Cercado formation. 



Genus METULELLA Gabb 



METULELLA CARONENSIS, new species ( ? " STROMBINA COSTARICENSIS " Olsson. 



new subspecies) 



Plate 7, figs. 7, S 



Shell solid, elongate-ovate, turrited, with a long attenuated upper 

 spire ; lower spire whorls nearly straight in outline, last whorl 

 medially flattened above. Whorls probably about ten in number 

 (early ones broken off) of which the first three are smooth, con- 

 stricted at the suture, but not tabulated below and form an at- 

 tenuated upper spire. Following whorls tabulated below the suture. 

 Axial sculpture precedes the spiral and consists, at the initiation, 



