226 BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



Fig. E, F. Veronicella olivacea, from one of original lot from Folvon. 



Fig. G. Lingual membrane of Glandina decussatu. 



Fig. H. Genitalia of P 'he nucurion Jul 'iolut us, var. Hemphilli; same references as in 



D ; one half of natural size. 

 Fig. I. PropJiysaon A*udersoni ; surface magnified sixteen times. 



a. a. a. reticulations of tlie body. 



6, b. foliolated spaces between reticulations. 



c. lower edge of the body. 



d. locomotive disk. 



Fig. J. The same, magnified eight diameters ; upper surface ; same references 



as the last. 



PLATE X. 



Drawn by A. H. Baldwin, Smithsonian Institution. 



Fig. A. Aglaja Jidelis ; the large, elevated black variety. 



Fig. B. Sculpturing of same. 



Fig. C. The same; small, black, elevated form. 



Fig. D. Sculpturing of last. 



Fig. E The same ; small, depressed form. 



Fig. F. Aglaja infumata; sculpturing. 



Fig. G. Arionta Mormonum ; sculpturing of the form figured on Plate XI. Figs. G, H. 



PLATE XI. 



Drawn by A. H. Baldwin. 



Fig. A. Arionta arrosa. 



Fig. B. Variety of last, approaching A. exarata. 



Fig. C. Sculpturing of last. 



Fig. D. Arionta erarata ; type. 



Fig. E. Sculpturing of last. 



Fig. F. Arionta Mormonum. 



Fig. G, H. Variety of last, connecting with Hillebrandi. 



