484 PROCEEDINGS OF THE ACADEMY OF [Sept., 



No especially noteworthy features have been noted in connection 

 with the digestive system. The mouth (PL. XVI, fig. 29) opens 

 into the acorn-shaped pharynx which has a length equal to about 

 one-ninth that of the body. Posteriorly it leads into the main gut 

 chamber which originates seven pairs of lateral intestinal branches 

 as a general thing. These are of rather even caliber at their source, 

 but soon become deeply constricted and give rise to a distinct anas- 

 tomosing system. 



The brain is located considerably nearer the mouth than the 

 anterior body margin. Both it and the nerves to which it gives rise 

 are fairly distinct, but in their distribution conform closely to the 

 well-known polyclad type. 



The testes are ventral, of moderate size and are clearly united by 

 means of a system of sperm capillaries, that apparently do not 

 anastomose, though this is not definitely established. The vasa 

 deferentia (PI. XVI, fig. 29) arise close to the posterior end of the 

 gut and skirt the external borders of the uteri. Near the anterior 

 end of the uteri these canals swing abruptly inward and fuse to form 

 a very short, median duct (PI. XV, fig. 28) which at once enters the 

 large spherical seminal vesicle. Leaving this last-named organ at 

 its opposite end, the slender ductus ejaculatorius passes into the base 

 of the penis. At the point where the latter receives the ductus the 

 rather large, oval granular gland makes its connection. In the 

 clearest of the total mounts the penis and its ducts appeared to arch 

 backward and the male aperture was accordingly posterior to it, though 

 this may have been due to contractions due to the killing fluids. 

 The penis and male pore are placed about one-fourth of the length 

 of the animal from the anterior margin of the bod}'. There is an 

 antrum masculinum of average size. 



The ovaries are dorsal and are united by an anastomosing system 

 of canals with the uteri. These last-named organs meet in the mid 

 line directly behind the mid gut (PI. XVI, fig. 29), though they 

 apparently do not fuse. Extending forward outside of the borders . 

 of the gut they anastomose frequently, particularly near the anterior 

 end where several convergent branches fuse (PI. XV, fig. 28) to form 

 the short vagina. This latter organ passes anteriorly a very short 

 distance and opens to the exterior immediately behind the seminal 

 vesicle. 



Euryleptodes pannulus sp. nov. 



5ut one specimen of this species has ever been seen by us. It was 

 nto the laboratory together with a large number of other 



