448 



EXPLANATION OF PLATES OF VOL. V. 



(v.), external orifice (or.). These are, however, all indicated by their initial letters in 

 Fig. A. The accessory organs when present are all indicated by their initial letters, 

 accessory duct (a. d.), prostate gland (pr. g.), dart sac (d. s.), prepuce (pp.), flagellura 

 (fl.), accessory gland (a. g ). 



Genitalia of 

 Fig. H. 



Tig- I. 

 Fig. J. 

 Fig. K. 

 Fig. L. 

 Fig. M. 



Fig. A. 

 Fig. B. 

 Fig. C. 

 Fig. D. 

 Fig. E. 

 Fig. F. 

 Fig. G. 



Patula strigosa. 

 Binneya notabilis. 

 Zonites inornatus. 



friabilis. 



laevigatus. 

 Limax Hewstoni. 

 Mesodon Clarki. 



Mesodon Mitchelliana. 



Columbiana. 



Roemeri. 



Triodopsis appressa. 

 Stenotrema monodon. 

 germanum. 



PLATE XII. 



Genitalia of (see description of Plate XI.) 



Fig. A. 

 Fig. B. 

 Fig. C. 

 Fig. D. 

 Fig. E. 

 Fig. F. 



Limax maximus. 

 montanus. 

 Ariolimax Columbianus. 



Californicus. 



Andersoni. 



niger. 



Fig. G. Ariolimax Hemphilli. 

 Fig. H. Prophysaon Hemphilli. 

 Fig. I. var. 



Fig. J - K. Hemphillia glandulosa. 



X (see description p. 249). 

 Fig. L. Macrocyclis Vancouverensis. 



PLATE XIIL 



Genitalia of (see description of Plate XI. ) 



Fig. A. Arionta sequoicola. Fig. F. 



X (see description, p. 368). Fig. G. 

 Fig. B. Arionta Stearnsiana. Fig. H. 



Fig. C. Nickliniana. 



Fig. D. Kelletti. 



Fig. E. Mormonum. Fig. I. 



7, dart sac. 



a. pr. g., accessory prostate gland. 



X (see description, p. 367). 



Same : dart. 



Same : concretions (see p. 367.) 

 Arionta Traski. 

 Vaginal prostate : x> bulb of 



same. 

 Arionta arrosa. 



Fig. A. 

 Fig. B. 

 Fig. C. 



Fig. D. 



Fig. A. 

 Fig. B. 



PLATE XIV. 

 Genitalia of (see description of Plate XI.) 



Arionta Townsendiana. Fig. E. Aglaja fidelis. 



ruficincta. Fig. F. 



Euparypha Tryoni. Fig. G. 



1,2,3 (see description, p. 377). Fig. H. 

 Glyptostoma Newberryanum. 



infumata. 

 Mesodon clausa. 

 Stenotrema spinosum. 



PLATE XV. 



Genitalia of (see description of Plate XI.) 

 Triodopsis Hopetonensis. Fig. C. Triodopsis Van Nostrandi. 



fallax. 



Fig. D. 



tridentata. 



