464 PROCEEDINGS OF THE ACADEMY OF [Sept., 



other hand, arc clearly defined, convoluted, unbranched canals 

 continuous across the mid line immediately behind the female 

 reproductive pore. From this point they swing forward, diverging 

 until opposite the posterior end of the pharynx where 

 >end abruptly, and parallelling the outer trunks for a relatively 

 distance pass inward and forward to the anterior end of the 

 seminal vesicle. This last-named organ (PL XII, fig. 6) is of mod- 

 erate size, muscular, oval in form, and is placed far behind the pharynx. 

 Leaving it posteriorly the short ejaculatory duct immediately enters 

 (PL XV, fig. 26) what is doubtless the granular gland. The latter 

 is of an unusual type. It is round-oval in form and its walls, pro- 

 duced posteriorly, appear to be continuous with the tissue of the 

 penis. The penis is short, blunt, and projects into an ample antrum 

 masculinum. 



Generally speaking, the ovaries are dorsal, but no connections have 

 been traced between them and the uteri. These canals have their 

 origin opposite a point midway between the mouth and the front 

 end of the pharynx. From here they extend backward, closely 

 skirting the pharynx, at whose posterior extremity they approach 

 one another and close to the mid line continue their course, diverging 

 slightly in order to pass around the male reproductive pore where 

 they enter the common egg canal (PL XII, fig. 6). The latter is 

 short, and almost at once extends forward and ventrally to open 

 into the antrum femininum. Posteriorly, the egg canal is continuous 

 with the moderate-sized accessory sac (PL XV, fig. 26). The 

 female orifice is usually a short distance posterior to that of the 

 male, though two specimens possess a common opening. 



No histological examination was made of the reproductive system. 



Leptoplana rupicola sp. nov. 



This large species is represented by three individuals found adher- 

 ing to the under surface of large rocks near extreme low-tide mark a 

 short distance south of the entrance to Monterey Bay. The largest 

 specimen, 35 mm. in length by 15 mm. in width, is somewhat oval 

 in form (PL XII, fig. 3), having the anterior end more rounded than 

 the posterior. The color above is light with a pinkish or reddish 

 tinge very marked in one of the specimens. There is a dark brown 

 or brownish-red line along the mid line in the region of the 

 pharynx. At the margins of the body the color is usually very 

 Ventrally, pigment is absent and the reproductive system 

 the pharynx appear with considerable distinctness. A clear, 



