rounded ribs of more or less prominence ; aperture ovate, about one-half the 

 length of the shell, polished, white and finely ribbed within ; (the outer lip in 

 perfect specimens is probably finely crenulated) ; canal short, nearly straight. 

 Lon. 2.1 ; lat. .94 in. Number of specimens, three ; two mature, dead, one 

 junior, fresh. 



Habitat. — Coast of Mendocino County, near Big Spanish Flat, California 

 where it was detected by Mr. Harford. 



Though almost typically fusiform, except in the brevity of the canal, I am 

 disposed to place it in Chrysodomus rather than with Fusus. Dr. Carpenter is 

 inclined to believe that certain specimens collected at Monterey by the late Dr. 

 C. A. Canfield and at Catalina Island by Dr. Cooper, are identical with the 

 above. I am of the opinion that it is rather a northern form, exceedingly local 

 in its distribution and more nearly allied to some of the later fossils of the coast 

 described by Mr. Gabb. 



Pleubotoma (Drillia) Montereyensis, Stearns. Plate I, fig. 2. 



P. (D.) Montereyensis, Stearns. Prel. Descr. August 28, 1871. 



Shell small, rather solid, elongate, slender ; spire elevated, sub-acute ; whorls, 

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

 concavely angulated ; suture distinct ; color, dark purplish brown or black ; sur- 

 face covered with rather coarse, inconspicuous, revolving costa?, 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, no- 

 dose, 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- 

 dules ; aperture less than half the length of the shell ; canal short ; terminal por- 

 tion of columella whitish, slightly twisted ; posterior sinus, rather broad rounded, 

 and of moderate depth. Long. .67 in.; lat. .24 in. 



Habitat. — Monterey, California, where the single specimen in my cabinet 

 was collected by Mr. Harford and myself in March, 1868. The shell, in its 

 general aspect, resembles the sombre colored species of the Gulf of California 

 and Panama. 



In the cabinet of the Rev. J. Rowell is a specimen perhaps of this species, 

 but not in sufficiently perfect condition to admit of certainty. 



Pleurotoma (Drillia) Hemphillii, Stearns. Plate I, fig. 3. 



P. (D.) Hemphilln, Stearns, Prel. Descr. August 28, 1871. 



Shell small, smooth, slender, polished ; spire long, subacute, rounded at apex ; 

 longitudinally marked with inconspicuous, oblique ribs, which are nearly obso- 

 lete on the body whorl ; number of whorls seven, with well defined sutural line, 

 and just below it a parallel 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 pro- 

 duced, anteriorly somewhat thickened ; sinus sutural, deep, calloused ; columella 

 thickened at ba-e ; canal very short, somewhat produced and twisted ; one spec- 



