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



EXPLANATION OF PLATE 6 

 All figures natural size 



Fig. la. Thais trophonoid.es, new species. Type. Lower Miocene of 

 Kern River, Californiia. 



Fig. lb. The same. Same locality as fig. la. 



Fig. 2a. Cancellaria sanjosei, new species. Type. Lower Miocene 

 of eastern San Luis Obispo County, California, 



Fig. 2b. The same. Same locality as fig. 2a. 



Fig. 3. Thais nehalemensis, new species. Type. 01igocene(?) of 

 northwestern Oregon. 



Fig. 4a. Thais blakei, new species. Type. Lower Miocene of Kern 

 River, California. 



Fig. 4b. The same. Same locality as fig. 4a. 



Fig. 5a. Molopophorus gabbi Dall. 01igocene(?) of Pittsburg Bluff, 

 Columbia County, Oregon. 



Fig. 5b. The same. 



Fig. 6. Thais panzana, new species. Type. Lower Miocene of eastern 

 San Luis Obispo County, California. 



Fig. 7a. Molopophorus dalli, new species. Type. 01igocene( ?) of Pitts- 

 burg Bluff, Columbia County, Oregon. 



Fig. 7b. The same. Same locality as fig. 7a. 



Fig. 8. Turris lincolnensis, new species. Type. Miocene of the Oregon 

 coast, six miles north of Yaquina Bay. 



Fig. 9a. Drillia ochsneri, new species. Type. Lower Miocene of Kern 

 River, California. 



Fig. 9b. The same. Same locality as fig. 9a. 



Fig. 9c. The same. Same locality as fig. 9a. 



Fig. 10a. Drillia wilsoni, new species. Type. Lower Miocene of eastern 

 San Luis Obispo County, California. 



Figs. 10b and 10c. The same. The same locality as fig. 10a. 



