n-2'K'i'A.r:k!Drs 



18 







>w l. #* 



(Lxplaraihm d$$t Uladt Jpllg. 



[ Gasteropoda.) 



PLAT*! XM. 



li 



16 



17 



23 



4 



H.M.Martin, del. 



t Sinclair 4- Son. lith. Ptila. 



