312 ANTILLEAN FOSSILS— G UPPY A ND DA LL. 



is more like Pho.s than N^assa, and was named P/i(>s guadeliqiemis by 

 Petit in 1852, It is distinguished from the typical species of Phos by 

 the excavation of the upjier part of the whorls, and is one of the two 

 species (iited by Morch under liis undefined genus Sfrongj/Iocera. The 

 otlier species, P. cancellatus, Quay and Gaimard (not A. Adams), is a 

 synonym of P. fextus according to Tryon, and is a true Phos. The 

 name Strouf/i/Jocera may therefore, perhaps, be revived with advantage 

 for species of the tinichuia ty])e, with a concentric oi)erculum, and, 

 among the fossils, P. solidnlus, Guppy, P. chipolanusj Dall, P.fasciolatus, 

 Ball, P. costatus, Gabb, and P. erectus, Guppy, should be referred to it. 



Genus STROMBINELLA, Dall. 



Shell slender, elongated, with a i)resutural cingulum.and a strong 

 node behind the outer lip, near the suture, in the adult; otherwise 

 sculptured like Anachls. This form appears at first sight like a small 

 strongly sculptured Terehra, of the section Actis, but the aperture is 

 that of Anachis, to which it doubtless bears much such a relation as 

 u3^sopnft does to Astyris. 



Type. — Strombinella acuformis, Dall. 



STROMBINELLA ACUFORMIS, Dall, new species. 

 (Plate XXIX, fig. 6.) 



Shell small, elongate, acute, slender, with 2 smooth nuclear and or 

 10 sculptured whorls; spirally sculptured only on the base of the last 

 whorl by narrow, deep grooves separated by wider, rounded threads, 

 which become finer on the canal; transverse scul])ture of (on the last 

 whorl 12) strong, fiexuous ribs extending from suture to suture, and 

 united in front of the suture by a low, flatfish, revolving ridge, which 

 develops strong nodules at the intersections with the ribs; the last 

 third of the last whorl is destitute of ribs, but the cingulum (tontinues 

 and terminates in a prominent node behind the outer lip; ai)erture 

 small, semilunar, with a thin callus on the pillar, through which the 

 spiral sculi)ture shows; the outer lip sharp, fiexuous, somewhat 

 expanded, with 1 to '^ coarse lira', internally; canal short, very deeply 

 cut; pillar thin, gyrate, leaving a i)ervious axis. Lon. 13.5, lat.3.5 mm. 



Oligocene of the Potrero, Eio Amina, Santo Domingo. No. 113784, 

 U.S.N.M. Two specimens of this elegant and interesting little shell 

 were obtained from a corresi)oudent and given to the j\luseum by the 

 late Thomas Bland. 



STROMBINA MIRA, Dall, new species. 

 (Plate XXIX. lig. 7.) 



Shell small, solid, acute, with 7 whorls ; the spire smooth except for 

 a small ridge in front of the narrowly channeled suture; the last whorl 

 finely spirally grooved below the periphery and on the pillar; aperture 



