466 PROCEEDINGS OF THE ACADEMY OF [Sept., 



opposite end, the canal plunges at once into the comparatively large 

 granular gland (PL XIII, fig. 13), and after its exit pursues its 

 course to the base of the penis. A triangular muscular sheath sur- 

 rounds the seminal vesicle and the terminations of the vasa deferentia. 

 The copulatory apparatus is single and of the normal type. A large 

 antrum masculinum is present. 



As usual, the ovaries are dorsal and the uteri anteriorly are continu- 

 ous across the mid line (PL XII, fig. 3). Immediately posterior 

 to the male reproductive opening the uteri bend inward and meet to 

 form the median oviduct (PL XV, fig. 22) that exists in the form 

 of a relatively large canal, on one hand uniting with the long yet 

 ample accessory gland and in the other direction with the spacious 

 shell gland chamber and the antrum femininum. The opening to 

 the exterior is close to that of the male and immediately in front of 

 the accessory gland. 



Leptoplana timida sp. nov. 



This species is evidently rare as it is represented by only two 

 individuals taken along the southern shore of Monterey Bay. The 

 color of the dorsal surface is clear, translucent white, dotted more or 

 less uniformly with minute dark red spots. In the central regions 

 of the body these pigment spots are closely grouped to form a trans- 

 verse, saddle-shaped blotch that becomes especially conspicuous 

 when the animal is in a contracted condition. On the ventral 

 surface of the body pigment is lacking, and through the white, 

 semi-transparent somatic muscles the pharynx and vasa deferentia 

 may be distinctly seen in living specimens. 



The body is broadly oval in shape (PL XII, fig. 1), blunt ante- 

 riorly, and the type specimen measures 23 mm. in length by 12 mm. 



in breadth. The mouth is situated a 

 \ .; • *. " very short distance posterior to the. 



* \\ ',. centre of the body. Tentacles are 



■ J i"' lacking. The penis is located imme- 



0jfyr i ** ; * »*•£ ** diately behind the pharyngeal pocket 



one-fourth of the length of the body 



i- o r. ,, * . r from the posterior end and is directed 



*ig. 6— Eyes and brain of Lepto- ,. , j an. n. £ o\ 



plana timida. backward. The eyes (text fig. 3) are 



arranged as usual in four clusters, the 



cerebral consisting of about 40 in each on both sides of the brain, 



while the tentacle groups, each comprising 12 comparatively large 



irregular ocelli, are more laterally placed. No eyes occur on the 



margins of the body. 



