18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. G6 



clear whorls smooth, rather large, moderately constricted at the 

 suture. Postnuclear whorls axially sculptured (nine on the last 

 whorl) with strong, rather sharp ribs over the anterior two- 

 thirds of the whorl, almost suppressed over the anal fasciole, nod- 

 ular and protractively offset on the siibsutural band; spirally 

 sculptured with a strong, nodular, subsutural band and an- 

 tenorly, between the anal fasciole and suture on the five later 

 whorls, marked by five interaxial bands, separated on tlie earlier 

 whorls by narrow striae and on the later whorls by interspaces one- 

 half their width. On the base, the axials gradually diminish in size 

 and terminate halfway across the canal ; below, the spirals continue 

 to the end of the canal. Outer lip broken awav. Inner lip smooth, 

 borders overlapping the pillar. Anterior canal rather short and 

 slightly curved dextrally. The species is named in honor of F. W. 

 Penny, the collector. 



Dimensions: Type (U. S. Nat. Mus. Cat. No. 352630) measures: 

 Altitude 9.3 mm. ; greatest diameter 3 mm. 



This species is characterized by its nodulous, subsutural band. 



Occurrence. — Middle or lower Miocene : In flood-wash, 1 mile 

 south of Brasso railway station. 



DRILLIA PENNYI ACARIA, new subspecies 



Plate 1, fig. 2 



Shell, small, slender, glazed, prominently axially sculptured, 

 marked by a strong subsutural band and consists of one and one- 

 half nuclear and seven postnuclear whorls. Spire whorls con- 

 stricted at the suture ; suture moderately appressed and wavy. Nu- 

 cleus small, globular, and smooth. Postnuclear whorls with strong 

 ribs (13 on the last whorl), nodular on the early whorls and 

 rounded on the later, suppressed within the indistinct anal fasciole 

 and protractively offset and nodular on the subsutural band. Spi- 

 rally sculptured between the axials with striae, indistinct on the ear- 

 lier whorls and distinct on the later whorls, separated by Ioav, nar- 

 row, flat bands. On the base, the axials terminate at the posterior 

 part of canal; the spirals at first overrun the axials, but later con- 

 tinue alone to the end of the canal. A strong varix is situated be- 

 hind the outerlip. Inner lip formed of a thin wash of callus, ex- 

 teriorly it loosely overlaps the pillar; anterior canal short. 



Dimensions: Type (U. S. Nat. Mus. Cat. No. 352631) measures: 

 Altitude 5.2 mm.; greatest diameter 2 mm. 



The new subspecies here described differs from Dnllia pennyi, 

 new species, in possessing a smaller and shorter nucleus. It is also 

 a more slender shell and has a less distinct anal fasciole. 



Occurrence. — Middle or lower Miocene: In flood-wash, 1 mile 

 south of Brasso, Trinidad, British West Indies. 



