Plate XIII. 

 Discodoris voniheringi MacFarland. 



Fig. 66. Labial armature, a, median; h, lateral plates; c, an- 

 terior border, x 37. 



Fig. 67. Front view of three typical lateral teeth of first row 

 of radula. x 212. 



Fig. 68. Front view of three typical lateral teeth from middle 

 of first row of radula. x 212. 



Fig. 69. Outermost lateral teeth of nth row of radula, ob- 

 liquely from above, x 212. 



Fig. 70. Outline of cross-section of nidamental duct, d, dorsal ; 

 V, ventral ridge; g, groove between them, x 50. 



Fig. 71. Reconstruction from serial sections showing detailed 

 relations of the ducts of the anterior genital mass. h. a., 

 anterior end of hermaphroditic ampulla as it enters the 

 nidamental-albumen gland complex; sp. d., spermatic 

 duct emerging; n. d., nidamental duct; spth., spermato- 

 theca; u. d., uterine duct; sp. c, spermatocyst, with its 

 duct, spc. d., leading into the uterine duct; vag. d., 

 vaginal duct, cut ofif short to show the relations of the 

 underlying organs. The dotted oval upon the surface 

 of the nidamental gland indicates the approximate 

 boundary of the albumen gland. 



