56 PROCEEDINGS OF THE NATIONAL MUSEUM. ^ol. 56. 



within; inner lip erased; canal short but distinct. Height of shell, 

 5.2; of last whorl, 3.25; diameter, 2.5 mm. Cat. No. 2G8703(^ 

 U.S.N.M. 



Ba7ige.— Dredged in Agua Verde Bay, Gulf of California. Dr. 



Paul Bartsch. 



? PHILBERTIA DIONE, new species. 



Shell minute, whitish or yellowish with whiter mottling, sub- 

 cylindric, coarsely sculptured, with about six whorls exclusive of the 

 (lost) nucleus; suture obscure, constricted, somewhat appressed; 

 spiral sculpture of (on the earlier whorls two, on the later ones three) 

 strong equal cords, slightly swollen at the intersections and with 

 somewhat narrower interspaces, the suture is laid on a fourth cord 

 which is usually invisible ; on the last whorl there are eight of these 

 cords, the last one nodulous ; there are three or four smaller threads 

 on the canal ; axial sculpture of coarse incremental lines and (on the 

 last whorl 9 or 10) rounded ribs extending from the suture to the 

 base, continuous up the spire which they half encircle; aperture 

 narrow, anal sulcus shallow and wide, outer lip slightly thickened 

 with a fev/ lirae inside ; inner lip smooth, canal narrow, very sliort. 

 Height of (decollate) shell, 5; of last whorl, 2.8; diameter, 2 mm. 

 Cat. No. 268703, U.S.N.M. 



Range. — With the preceding species. 



PHILBERTIA EPHAEDRA, new species. 



Shell small, slender, acute, very pale brown or whitish, the nucleus 

 with its apical whorl minute, transparent, smooth, bubble-like, fol- 

 lowed by one and a half faintly reticulate whorls; subsequent whorls 

 five and a half with a deep appressed suture; spiral sculpture of al- 

 ternate threads with narrower interspaces, the major threads (on the 

 spire two or three) rather prominent, especially the posterior one, 

 which forms a sort of shoulder to the whorl, more conspicuous in the 

 earlier whorls; the minor threads usually number one on the spire, 

 but on the last whorl sometimes two or even three in the interspaces 

 between the major threads; the threads are little or not at all swollen 

 where they cross the ribs but are rendered harsh by the intersection 

 of fine sharp close-set incremental lines; other axial sculpture of (on 

 the last whorl seven) prominent rounded ribs, crossing the whole 

 whorl, with subequal interspaces, and practically continuous verti- 

 cally up the spire; there is no obvious anal fasciole; aperture narrow, 

 the anal sulcus shallow, rounded, with no subsutural callus ; outer lip 

 subvaricose, moderately infolded, with a sharp edge, smooth inside; 

 inner lip erased ; canal short, wide, hardly recurved. Height of shell, 

 8.3 ; of last whorl, 5 ; diameter, 3.2 mm. Cat. No. 27410T, U.S.N.M. 



Range.— In beach drift at Panama; James Zetek. 



