Pi.EUKOTOMA (Drillia) Montkkeyensis : Stearm. 



Shell smiill, rather solid, elongate, slender : spire elevated, sub-acute ; whorls, seven 

 to eight moderately rounded ; upper portion of larger volutions somewhat concavely 

 an-'ulated ; suture distinct ; color, dark purplish brown or black : surface covered 

 with rather coarse, inconspicuous, revolving costie, interrupted on the body whorl by 

 rude incremental lines ; middle of upper whorls and upper part of body whorl displaying 

 fourteen to fifteen equidistant, longitudinal, nodose, slightly oblique ribs, which are 

 whitish in the specimen before me (being somewhat rubbed) on the larger whorls ; on the 

 smaller volutions of the spire a puckering at and following the suture suggests a second 

 indistinct series of no.Uiles : aperiure lo.-s ai.ui halt the longth oi the siiell ; canal short; 

 terminal portion of columella whitish, slightly twisted; posterior sinus, rather broad 

 rounded, and of moderate depth. Mean divergence about •Jti". Long. .07 in.; Lat. .ii in. 

 Habitat-Monterey, California, where the single specimen in my cabinet was collected by 

 Mr. Harford and myself in March, IHfJS. The shell, in its general aspect, resembles the 

 somlire colored species of tlie Ciulf of ralifornia and Pai.ama. 



Pi.ElIUOTOMA (^DRILLIA) UE.MfHlI.LU : S/eaffix. 



Shell small, smooth, slender, polished; spire long, subacute, rounded at ape.\ ; longi- 

 tudinally marked with inconspicuous, oblique ribs, which are nearly obsolete on the body 

 whorl; number of whorls seven, with well defined sutural line, and just below it a par- 

 allel impressed thread-like line : shell of an opaque dingy horn color; incremental lines 

 fine, marked in some specimens with dingy white; mouth obliquely ovate, about one- 

 third the length of the shell ; labrum produced, anteriorly somewhat thickened ; sinus 

 sutural, deep, calloused; columella thickened at base; canal very short, somewhat pro- 

 duced and twisted ; one specimen shows obscure, revolving, impressed lines below the 

 swell of the body whorl; size quite uniform. Lon. .26; Lat. .09 inch. Habitat— Los 

 Todos Santos Bay, Lower California, where several specimens were obtained by Mr. 

 Hemphill, for whom I have named this well marked species. 



.lonrnal * AreusPriii 



