1911.] NATURAL SCIENCES OP PHILADELPHIA. 339 



ACTEONID^J. 



*Bullina chipolana Dall. 



Bullina (Abderospira) chipolana Dall, Proc. U. S. Nat. Mus., XVIII, p. 32. 



Chipola beds, Chipola River, Florida; near Gatun, Rowell (Dall). 



SOAPHANDRIDiE. 



*Volvulella sp. undet. 



Bulla (Volvula) cf. oxytata Bush, Toula, Jahrbuch der Kaiserlich-Konig- 

 lichen Geologischen Reichsanstalt, LVIII, 1908 (April 15, 1909), p. 709, 

 PL 28, fig. 4. 



Gatun. 



TEREBRID^l. 

 Terebra subsulcifera n. sp. PI. XXII, fig. 7. 



The shell is slender, the diameter contained about 7^ times in the 

 length, composed of about 15 whorls in a length of 31 mm. Sculpture : 

 A prominent band below the suture, fully one-third the width of the 

 whorl ; below it, and separated by a sulcus, another Dand half as wide, 

 below which there are weak, nearly obsolete spiral striae; the whole 

 crossed by rather sharp vertical riblets narrower than their intervals. 

 These are very slightly oblique on the upper band, vertical on the 

 sunken lower part of the whorl. The riblets gradually weaken below 

 the middle of the last whorl, leaving the base smooth. The columella 

 is strongly biplicate, the folds subobsolete at the aperture. 



Length 31, diam. 7 mm. 



This species has much in common with T. haitensis Dall, but it 

 differs by having two columellar folds among other minor differences. 

 A comparison kindly made by Dr. Dall shows them to be distinct. 

 T. sulcifera Sowerby, of the Santo Dommgo Oligocene, is described 

 as having a third subobsolete spiral sulcus, while the species under 

 consideration has only two sulci. 



Terebra gatunensie Toula. PI. XXII, fig. 2 ( x 23/ 2 '). 



Terebra (Oxymeria) gatunensis Toula, Jahrb., p. 705, PI. 25, fig. 14. 



This fine species reaches a length of 50 to 60 mm. The subsutural 

 band is about one-fourth the width of the whorl, with sculpture of 

 straight, vertical ribs, and is followed by a rather wide furrow, below 

 which there are seven rounded spiral cords, the upper one larger. 

 Fine, slightly bent, longitudinal ribs run from suture to suture over 

 cords and intervals, forming rounded knots at the intersections. 

 These ribs are about twice as far apart as the spiral cords on the upper 

 whorls, but on the later ones the cords and ribs are about equall} r 

 spaced. On the last whorl the siphonal fasciole is marked with rude 



