116 



PROCEEDINGS OF THE NATIONAL MUSEUM 



prostatic apparatuses in the wall of the male antrum and the penis 

 papilla (when present) ; female apparatus with a Lang's vesicle. 



Genus Adenoplana Stummer-Traunfels, 1933 



Definitiotm : Discocelidae with or without tentacular eye clusters; 

 mouth behind the pharynx; gonopores separate; male gonopore with 

 or without small accessory pore; with interpolated prostatic vesicle 

 situated above the male antrum; penis papilla wanting; wall of male 

 antrum with numerous prostatic apparatuses. 



Type species: Polycelis obovata Schmarda, 1859. 



Adenoplana antillarum, new species 



Figure 81, a-c 



Material: One specimen from the Smithsonian-Hartford Expedi- 

 tion. 



Form: Small, thick, opaque, slender (fig. 81, a) ; 8 mm. long by 2 mm. 

 wide (preserved) ; without any indication of tentacles. 



Eyes: Limited to the anterior end (fig. 81,a); marginal eyes rela- 

 tively large, forming a band along the anterior margin, scarcely extend- 

 ing to the level of the brain; tentacular clusters wanting; what may 



