1890.] XATLRAL SCIENCES OF PHILADELPHIA. 43 



Explanation of Plate I. 



Fig. a. Radula of ^4eroj;e cq/^Va, natural size. 



Fig. B. Enlarged view of rhachidian tooth. 



Fig. c. Complete half-row of teeth. 



Fig. D. Genitalia. P. penis ; ;;. /■. penis retractor muscle ; v. d. vas 

 deferens ; a. g. albumen gland. 



Fig. E. Albumen gland, opposite side ; e. epididymis. 



Fig. F. Lower portion of oviduct, showing the convoluted vas de- 

 ferens. 



Fig's G. H. I. J. K. Papa hordeacella Pilsbry. 



tv 



