No.ino. PROCEEDINGS OF THE NATIONAL MUSEUM. 311 



Sauto Domingo, Grabb; Potrero, Rio Amiua, Bland; Jamaica, Barrett; 

 iu the Oligocene. In his paper above cited Gabb confused three dif- 

 ferent species of Pho.s under a name which belongs to none of them. 

 P. elegans and P. moorei of Guppy are excellent species, and neither is 

 identical with the recent Pacific Coast species of Hinds. 



PHOS (STRONGYLOCERA) FASCIOLATUS, Dall, new species. 

 (Plate XXVIII, fig. 12. ) 



Shell solid, acute, with li smooth, nuclear, and 7 strongly sculptured, 

 well rounded whorls; spiral sculpture of numerous flat spiral bands 

 separated by narrow grooves, alternated on the earlier whorls, stronger 

 on the base and more or less swollen on the spire when they pass over 

 the ribs ; transverse sculpture of (on the last whorl 14) numerous ele- 

 vated, even, rounded, snbequal ribs extending clear over the whorls 

 and separated by wider interspaces; suture distinct; aperture subovate 

 with a strong callus on the body and pillar, where there are a few faint 

 tubercles, while the anterior edge of the pillar is marked by a sharp 

 spiral keel; outer lip thickened, lirate; canal short, recurved ; siphonal 

 fasciole strong, keeled on each side, with a succession of in-ominent, 

 sigmoid, elevated lamelhe between the keels. Lon. 24, lat.11.5 mm. 



Oligocene at the Potrero, Eio Amina, Santo Domingo, Bland. Xo. 

 ] 13778, IT.S.N.]\I. This species is nearest to P. .srwico.s/ft^w.v, Guppy, 

 and P. guppyi, Gabb, both of which are easily discriminated by the 

 differences iu sculpture. 



PHOS (STRONGYLOCERA) CHIPOLANUS, Dall, new species. 



Shell acute, with "2 smooth, nuclear and 7 strongly sculptured whorls, 

 somewhat appressed at the suture; spiral sculpture much as in P. scmi- 

 coHiatus of small, stout, rounded, partly alternated ridges swollen where 

 they pass over the ribs, sparser and stronger on the base ; transverse 

 sculpture of (on the last whorl 7) strong, rounded ribs, evenly distributed 

 and most prominent at the periphery; aperture wide, the outer lip 

 lirate, the pillar keeled and reflected on the anterior edge; a sharp con- 

 striction and keel behind the siphonal fasciole, which is flexuously and 

 imbricately sculptured transversely with a few small, spiral grooves; a 

 moderate callus on the body and j)illar, Lon. 25, lat. 13 mm, 



Oligocene of the Chipola beds, Calhoun County, Florida, Dall. No. 

 114101, IT.S.X.M. This species is most nearly related to Fhos soUdnhis 

 (Gupi)y as yassa), P. semicostatHs, Gabb, and P. <jupi)yi, Gabb, all of 

 which are well distinguished by sculpture and details of form. Among 

 recent species Phos unicincUis, Say (as Wassa), is allied. I have already 

 shown' that the last mentioned is distinguished both from Phos and 

 Kassa by its operculum, which is lozenge-shaped, pointed in front and 

 behind with a subcentral nucleus and concentric elements. The shell 



1 Blake Gastr., Bull. Mus. Cornp. Zool., XVIII, p. 178, 1889. 



