NO. 2288. NEW MOLLUSKS OF THE FAMILY TURRITIDAE— BALL. 77 



with wider minutely striated interspaces, over the whole surface, not 

 swollen where they pass over the ribs; the whorls are slightly 

 shouldered, there are about three or four of the straplike interspaces 

 on the spire between the shoulder and the succeedhig suture, behind 

 the shoulder they are less obvious and the sculpture less coarse; on 

 the last whorl the sculpture is quite uniform ; axial sculpture of nine 

 or ten protractively oblique slightly sigmoid ribs which nearly reach 

 the canal and on the spire extend from suture to suture; aperture 

 narrow, the anal sulcus wide and shallow, close to the suture, the 

 outer lip is thickened but not internally lirate ; the inner lip smooth ; 

 the canal is short, wide, and hardly differentiated from the rest of 

 the aperture. Height of shell, 9; of last whorl, 6; diameter, 3 mm. 

 Cat. No. 55285, U.S.N.M. 



Range. — San Diego, California, Stearns collection. 



It is possible this may be a Mangilia with unusually thickened lip. 

 or an immature Cytharella. 



CYTHARELLA ELECTRA, new species. 



Sliell minute, waxen white, sometimes with faint purplish spiral 

 bands, with two and a half nuclear and four and a half subsequent re- 

 ticulate whorls; nucleus turbinate, the first two whorls smooth, pol- 

 ished, brown, the remainder axially minutely ribbed, the sculpture 

 passing into that of the normal subsequent whorls ; suture distinct, not 

 appressed; spiral sculpture between the succeeding suture and the 

 fasciole on the spire, of four equal and equally spaced threads with 

 slightly wider interspaces; rarely the posterior thread is more prom- 

 inent than the others; on the last whorl there are about nine threads, 

 more adjacent as they approach the canal which has about six more 

 closely set; axial sculpture of (on the last whorl about 14) low 

 narrow straight ribs extending from the suture to the canal with 

 slightly narrower interspaces ; there is no nodulation at the intersec- 

 tions with the spiral sculpture and the reticulations are squarish and 

 deep; aperture narrow, anal sulcus shallow, rounded, conspicuous; 

 outer lip varicose, sharp edged, not lirate within; inner lip erased, 

 canal hardly differentiated. Height of shell, 5.5 ; of last whorl, 3.7 ; 

 diameter, 2 mm. Cat. 267706, U.S.N.M. 



Range. — Head of Concepcion Bay, Gulf of California, Dr. Paul 

 Bartsch. 



The general aspect except for the sulcus is that of a Mitromoryha. 



CYTHARELLA NIOBE, new species. 



Plate 23, figs. 4, 5. 



Shell small, whitish, with or without pale bands or clouds of light 

 brown, fusiform, the nucleus with a minute smooth translucent apex, 

 the succeeding whorl sharply spirally striated, this sculpture fol- 

 lowed by minute reticulation for about half a whorl and then by the 



