96 CALIFORNIA ACADEMY OF SCIENCES [Paoc. 4th Seb. 



EXPLANATION OF PLATE 10 



Fig. 1. Surcula cohni, new species, X2. Type. 



Fig. 2a. Surcula (Surculites) sinuata Gabb, XI. Mouth view of half 

 grown individual which is marked by spiral lines. Univ. of Cal. Locality 

 458. 



Fig. 2b. Surcula (Surculites) sinuata Gabb, XI. Back view of speci- 

 men figured as Fig. 2a. 



Fig. 2c. Surcula (Surculites) sinuata Gabb, XI. Back view of mature 

 individual showing almost complete absence of decoration. Univ. of Cal. 

 Locality 458. 



Fig. 3. Drillia ornata, new species, X2. Type specimen. 



Fig. 4a. Turris pulchra, new species, X2. Mouth view of type specimen. 



Fig. 4b. Turris pulchra, new species, X2. Back view of type. 



Fig. 5. Turris, new species, X2. 



Fig. 6. Turris monolifera Cooper, new species, X2. Specimen is an un- 

 usually large one from Cal. Acad. Sci. Locality 183. 



Fig. 7a. Surcula washingtoniana (Weaver), XI. Mouth view of cotype. 



Fig. 7b. Surcula washingtoniana (Weaver), XI. Back view of cotype. 



Fig. 8. Surcula cowlitzensis Weaver, XI. Back view of cotype from 

 Cal. Acad. Sci. Locality 182. This is one of the most beautiful forms 

 from the Tejon Eocene. It is abundant in Washington and at the type 

 locality of the Tejon. 



Fig. 9. Turris cf. monolifera Cooper, X2. Specimen from Cal. Acad. 

 Sci. Locality 183, a young individual. 



Fig. 10. Surcula uvasana, new species. Back view of type. 



Fig. 11. Surcula io (Gabb), XI. This form was described as a Fascio- 

 laria but careful examination fails to reveal any traces of plications and the 

 position of the sinus is such as found in the genus Surcula. Cal. Acad. Sci. 

 Locality 244. 



