THE NAUTILUS. 127 



1&%), it differs in being rougher, and of chestnut rather than of 

 olive-brown color; but the contour is nearly the same. P. Gincinnati- 

 cnsis Lea is paler in color, with shorter, more nearly circular aperture, 

 and different texture. The true Bythinella intermedia of Tryon is a. 

 wholly different thing. 



Thirty-eight specimens examined. Types from the locality and col- 

 lector first mentioned above. The denticle formula is > 5. 6, ti. 



Since the above was written, additional specimens from San Fran- 

 cisco have been received from Mr. VV. J. Raymond. They agree in 



all respects with the types. 



^ 

 ON A NEW SPECIES OF DRILLIA FROM CALIFORNIA. 



BY \VM. H DALL. 



Drillia empyrosia, u. sp. 



Shell solid, with a high acute spire and polished surface; color yel- 

 lowish with a burnt sienna brown tint on the later whorls, a paler 

 peripheral band develops white patches where it crosses the ribs ; 

 transverse sculpture of (about 11) slightly oblique somewhat flexuous 

 ribs, obsolete below the periphery and upon the anal fasciole, sharpest 

 on the earlier whorls ; Spiral sculpture of coarse, sometimes nearly 

 obsolete threads, most obvious below the periphery ; whorls nine, the 

 nucleus lost in the specimen ; aperture short, wide, with a deep wide 

 notch leaving a wide fasciole, a callous lump above the notch on the 

 body, and a rather strong whitish callus, externally brown-edged, on 

 the pillar; siphonal notch wide with a marked fasciole, the canal 

 slightly recurved. Lon. of shell 31, of last whorl 16; of aperture 10, 

 max. diam. 10 mm. 



Found in deep water off San Pedro, Cala., by Mr. and Mrs. T. S. 

 Oldroyd. 



This species resembles D. unitnaculata Sowerby. but is smaller, 

 with a different coloration, with less nodular and more oblique ribs, 

 and more slender form. Though not the largest, it is perhaps the 

 most elegant Pleurotonioid of alta California. 



NEW PUPIDIE. 



BY DR. V. STERKI. 



BIFCDARIA QUADRIDENTATA, n. sp. Shell narrowly perforate-rimate, 

 conical-turriculate, with the apex somewhat obtuse; colorless glassy; 



