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



pillar very short, stout, and straight; canal hardly differentiated 

 from the aperture but deeply cut ; height of shell, 12 ; of last whorl, 

 7.5 ; diameter, 5 mm. Cat. No. 15952, U.S.N.M. 



Range. — Panama, Col. E. Jewett. 



This is a very solid little shell and of a very attractive color. It is 

 a typical BeUaspira. 



? HAEDROPLEURA MELITA, new species. 



Plate 24, fig. 7. 



Shell small, slender, waxen white, with an obscure purple band in 

 front of the suture and the region of the canal dark purple, when 

 fresh; nucleus of two and a half gradually enlarging whorls, the 

 first smooth, the last more or less axially minutely ribbed, and five 

 subsequent whorls; axial sculpture of (on the last whorl) eight rather 

 sharp ribs extending from the suture (which they undulate) to the 

 region of the canal and continuous up the spire in a direct line with 

 somewhat wider interspaces ; suture distinct, appressed ; spiral sculp- 

 ture of fine uniform evenly spaced rounded threads, not swollen 

 where they cross the ribs, a single thread at the shoulder is more 

 prominent but not larger than the others, from which and from the 

 suture it is separated by a space devoid of the spiral sculpture which 

 elsewhere covers the surface; the ribs are shortly arcuate when pass- 

 ing over the otherwise obscure anal fascicle, and the depressions be- 

 tween them, the suture and the shoulder are markedly excavated ; 

 aperture narrow, anal sulcus conspicuous, rounded not deep ; outer lip 

 strongly varicose, not internally lirate, inner lip smooth, pillar short, 

 straight, canal short, hardly differentiated from the aperture. Height 

 of shell, 5.2; of last whorl, 3; diameter, 2 mm. Cat. No. 266436, 

 U.S.N.M. 



Bangs. — Agua Verde Bay, Gulf of California, Dr. Paul Bartsch. 



The shell, though fresh, is without the soft parts, and therefore 

 it can not be determined Avhether it is operculate or not. 



CRYPTOGEMMA POLYCASTE, new species. 

 Plate 9, figs. 4, 7. 



Shell white, with a pale olivaceous periostracum, and five whorls 

 exclusive of the (lost) nucleus, rather slender and moderately rounded 

 except for a single strong peripheral keel which marks the deepest 

 part of the anal sulcus; suture distinct, not appressed, with a feebly 

 indicated flattish area between it and the posterior edge of the anal 

 fasciole, which between the keel and the flattening is slightly im- 

 pressed; there is no other spiral sculpture and the axial sculpture 

 consists mostly of moderately prominent incremental lines; anal sul- 

 cus deep and wide ; outer lip thin, prominently arcuately produced ; 

 inner lip smooth, pillar very short, gyrate ; axis pervious ; canal pro- 



