78 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th See. 



Genus MOLOPOPHORUS Gabb 

 Molopophorus dalli, new species 



Plate 6, figures 7a and 7b. 



Shell moderate in size, stout, conical above, not strongly 

 sculptured, with five whorls ; spire rather high for the genus, 

 tapering evenly except for the sutural collar ; younger whorls 

 ornamented with beaded collars, older whorls with beads obso- 

 lete ; body-whorl with distinct constriction below collar ; mouth 

 ovate, narrowed above; outer lip thin and smooth; inner lip 

 widely calloused; canal very short, wide, recurved; pillar partly 

 encircled by strong plication which forms the outer border of 

 the canal ; surface marked by irregular axial ridges crossed by 

 spiral cords. 



Dimensions : — Length, 39 mm. ; width, 25 mm. 



Type: — No. 168, and cotype No. 169, Gal. Acad. Sci., from 

 the 01igocene(?) near Clatskanie, Oregon, locality 165, in a 

 prominent bluff along the county road about 2/4 miles south- 

 west of Glatskanie. 



Molopophorus gabbi Dall 



Plate 6, figures 5a and 5b. 



Molopophorus gabbi Dall, U. S. G. S. Professional Paper 

 No. 59, 1909. 



This species has been figured to illustrate the characters 

 which distinguish it from Molopophorus dalli. As pointed out 

 by Dr. Dall the form and sculpture of this species vary con- 

 siderably, and it may be shown later that the form, here de- 

 scribed as new, is only a wide variation of Molopophorus gabbi 

 Dall. At present there seems to be sufficient difference in form 

 and sculpture to separate the two as distinct species. 



Genus CHRYSODOMUS Swains. 



Chrysodomus kernensis, new species 



Plate 4, figures 6a and 6b. 



Shell of moderate size, solid, with seven whorls, nucleus lost 

 on the type; spire high; apex subacute; whorls with well 

 rounded shoulder near the middle, slightly rounded below, flat 

 or concave above, rather strongly constricted in front of the 



