TAB. XIII. 



Fig. 



1. Trochus millegranus, page 127. 



a. side view. 

 h. view of base. 



2. Trochus forraosus, ^;. 125. 



a. side view. 



b. view of base. 



3. Trochus multigranus (slightly enlarged ),j';. 127. 



a. side view. 

 h. view of base. 



4. Trochus Ziziphinus (?), var. monstrosa,yj. 124. 



5. Trochus conulus, ^;. 125. 



a. side view. 

 h. view of base. 



6. Trochus papillosus (?), p. 126. 



a. side view. 

 h. view of base. 



c. side view, var. similis. 



7. Trochus creuularis, p. 123. 



a. side view. 

 (^. view of base. 



8. Trochus subexcavatus, j?;. 126. 



a. side view. 



h. view of base. 



c. back view of var. f3. 



9. Trochus Ziziphinus, />. 124. 



a. side view, var. concavus. 

 h. view of base. 



c. side view of smooth or decorticated specimen. 



d. side view of var. Isevigatus. 



e. view of base. 



/. side view of var. conuloides. 

 (J. view of base. 



