TAB. XIII. 



Fig. 



1. Trochus millegranuSj^aae 127. 



a. side view. 



b. view of base. 



2. Trochus formosus, p. 125. 



a. side view. 



b. view of base. 



3. Trochus multigranus (slightly enlarged), p. 127. 



a. side view. 



b. view of base. 



4. Trochus Ziziphinus (?), var. moustrosus, p. 124. 



5. Trochus conulus, p. 125. 



a. side view. 



b. view of base. 



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



a. side view. 



b. view of base. 



c. side view, var. similis. 



7. Trochus crenularis, p. 123. 



a. side view. 



b. view of base. 



8. Trochus subexcavatus, p. 126. 



a. side view. 



b. view of base. 



c. back view of var. (5. 



9. Trochus Ziziphinus,/;. 124. 



a. side view, var. concavus. 



b. view of base. 



c. side view of smooth or decorticated specimen. 



d. side view of var. lgevigatus. 



e. view of base. 



/. side view of var. conuloides. 

 g. view of base. 



