66 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



This species resembles C. miicronata (Gabb) in decoration 

 but its whorls are far less rounded and its spire is much 

 shorter. 



Dimensions : — Length of imperfect t3^pe, 22 mm. ; width of 

 body whorl, 1 1 mm. 



Type: — No. 11055, Univ. California. Locality 452, Tejon 

 group. Canada de las Uvas, the type locality of this group. 

 On road to Grapevine Creek, S. W. Ya of S. E. %, Sec. 29, 

 T. 10 N., R. 19 W. Coll., R. E. Dickerson. 



Named for John Ruckman, who assisted the writer in identi- 

 fying the fauna of this locality. 



Siphonalia bicarinata, new species 

 Plate 8, figures la, lb, Ic, Id 



Shell, fusiform ; whorls seven, decorated by two spiral rows 

 of twelve nodes ; shoulder of whorl distinct, nodose ; portion 

 between shoulder and wavy suture marked by spiral threads of 

 sub-equal strength; portion below shoulder marked by ribs of 

 variable strength; body-whorl large, with biangular outer lip. 



The two rows of nodes of this species make it easily separ- 

 able from Siphonalia sutterensis Dickerson. The young in- 

 dividuals exhibit less accentuated characters than the older. 

 (See figures Ic, Id.) 



Dimensions: — Length, 20 mm.; width of body-whorl, 11 

 mm. 



Type: — No. 316, and cotype. No. 317, Cal. Acad. Sci. 

 Locality 183, in the west bank of the Cowlitz River about one 

 and three-fourths miles southeast of Vader (Little Falls), 

 Washington, about one-half mile south of locality 182. Coll., 

 B. Martin. 



Molopophorus tejonensis, new species 

 Plate 8, figures 3a, 3b 



Shell biconical with very short recurved canal ; spire short, 

 with five flat sided whorls; suture distinct, linear; bordered 

 by a narrow but distinct collar; decoration of each spire whorl 

 consisting of about seven spiral lines crossed by about thirty 

 slightly sinuous lines ; axial ribs, sub-equal in strength ; small 

 rounded nodes present at crossing of two sets of lines ; decora- 

 tion of body whorl similar except for three closely spaced 



