474 PROCEEDINGS OF THE ACADEMY OF [Sept., 



length from the posterior end of the body. There is a fair-sized 

 antrum masculinum. 



The ovaries are dorsal and communicate with the uteri by an 

 anastomosing system of connecting tubules. The uteri, fused in 

 the mid line anteriorly (PI. XII, fig. 7), pass backward, skirting the 

 margin of the pharynx, and then coursing parallel to the vasa defer- 

 entia posteriorly meet in the mid line. Here they enter the duct 

 leading forward from the accessory gland (PI. XV, fig. 23), and on 

 the other hand pursue a somewhat tortuous course to expand into 

 the antrum femininum, that opens to the exterior immediately in 

 front of the posterior loop of the vasa deferentia. About opposite 

 the granular gland of the male system the uteri become distended to 

 form spindle-shaped glands, which may correspond to uterus glands 

 in other species. 



Two specimens were kept in captivity for a few days early in 

 June, and deposited several hundred eggs at the average rate of one 

 every forty-five seconds. 



Tribus COTYLEA. 



With sucking disc. Mouth in middle of the body or anterior to it. 

 Copulatory apparatus in the anterior end of the body. Without 

 tentacles or with marginal tentacles. 



Family PSEUDOCERIDiE Lang, 1884. 



Body oval or elliptical with fold-like marginal tentacles. Mouth 

 in middle of anterior half of body. Pharynx collar-like. Main gut 

 long and spacious. Intestinal branches numerous and anastomosing. 

 Eyes in brain area and tentacles. 



LICHENIPLA.NA gen. nov. 



Small papillae on dorsal surface. Gut branches very numerous. 

 Copulatory apparatus single. 



Licheniplana lepida sp. nov. 



This species is represented by four individuals collected on the 

 under surface of stones on the southern shore of Monterey Bay. 

 The largest specimen is broad oval in outline (PI. XIV, fig. 17) and 

 measures 12 mm. in length by 8 mm. in width. It is a very delicate 

 species, living in crevices of the rocks or similar places of conceal- 

 ment, and when disturbed is exceptionally slow in its movements. 

 Dorsally the ground color is white, gray, or lead color with occasional 

 small pinkish or dark red pigment spots. The ventral surface is 

 unpigmentod. 



