102 AMERICAN JOURNAL 



bands often absent, wholly or in part, one on the lower, one on 

 the middle and one on the upper portion of the whorl. These 

 are only apparent on the last whorl in most cases. 

 Loix -32, lat. -14 in., defl. 35°. 



Habitat. Monterey, California ; dead on beach, ten specimens ; 

 Diill, 1866. 



The species of Clathurella with crenulated inner lip and 

 thickened striated outer lip and deep, subsutural sinus may 

 eventually require a section for themselves as distinguished from 

 those with a smooth columella and outer lip and inconspicuous 

 sinus. The above species and the next would belong together 

 in that section of the genus. They can hardly be placed in 

 Borsonia or Cordiera, as the crenulations are not true plicae, 

 and the outer lip in those genera is thin and simple, and the 

 sinus is sutural and almost obselete. 



The nearest ally of C. Canfieldi is the following species : 



Clathurella affinis, n. s. 



Shell resembling the last but smaller, though with as many 

 whorls. Sculpture similar, but much coarser and stronger, with 

 the longitudinal plicae represented by strong rounded ribs, which 

 pass clear over the whorls, which are more inflated than in the 

 last. Aperture smaller and narrower than in the last, less than 

 one third as long as the shell. Canal very short and narrow. 

 Outer lip internally lirate, much thickened with two strong 

 toothlike dentations. Inner lip with four or five crenulations 

 on the columella. Coloration livid purple with a single white 

 band on the middle of the last whorl, which appears just above 

 the suture on the next whorl. 



Lon. -25, lat. -11 in., defl. 30°. 



Habitat, Cape St. Lucas ; 1 specimen; J. Xantus. Cab. Smith- 

 sonian Institution, No. 4084. 



Drillia Kennicotti, n. s. 



Shell solid, acuminate, white, with traces of a thin yellowish 

 epidermis. Columella twisted ; canal slightly recurved ; inner 

 lip with a thin white callus ; outer lip strongly flexuous, deeply 

 excavated below the suture, exceedingly eft'use anteriorly, thin 

 and sharp. Nucleus smooth, white, small, obliquely bent. 

 Sculpture of the upper whorls consisting of a very strong, broad, 

 rounded carina, a little below the middle of the whorl, flattened 

 on top, with a faint revolving ridge on each side of it, the lower 

 one just above the suture, which is appressed. The whorls are 

 quite flat except for the ridges and carina, and marked by strong 



