Proc. Acad. Nat. Sci., Phi la. , 1893. 



Plate XI 



2 f^dC^) 



3 ggCoc^ 



30 



]^F^° Tn 



2 3 



4 3 2 1 C 



/\ 



^ 



00 



U 



20 21 22 



c 1 



5 6 7 



A . A 



8 9 10 



III 



A A A /\ 



fflfi Q@0iW^ fi# a 



IV 



C I II 12 13 14 



15 16 17 25 35 40 



C I 



^ [P P 



V 



15 



18 20 



25 26 



20 



10 



12 



13 



SP? 



VI 



C . 6 7 



8 9 



pOQ^P 27 29 30 



{/"^ t/ VI] 



l? lb '7 



STERKI, RADULA OF LAND MOLLUSKS. 



