460 PROCEEDINGS OF THE ACADEMY OF [Sept., 



the brain and extending directly forward along the sides of this 

 organ fo a point a little farther from the brain than its length. 

 The mouth (PL XVIII, fig. 39), situated somewhat in front of the 

 the body, opens into the pharnyx, which is placed almost 

 entirely in front of the centre of the animal. Its length is between 

 -third and one-fourth that of the body, and is devoid of diver- 

 ticula although it is moderately folded. The rather narrow main 

 gut, of about the same length as the pharyngeal pocket, bears six 

 or seven pairs of lateral branches with occasional alternating out- 

 pouching^. A median branch crosses the brain, and it like the 

 others is without anastomoses. 



It is evident that this species is carnivorous, as both the type and 

 cotype contain radulse of some gastropod mollusk. In one individual 

 a radula occupies the anterior branch of the gut, extending across 

 the brain, and shows signs of disintegration under the action of the 

 digestive juice. Also in many of the gut pouches isolated teeth are 

 to be seen in considerable numbers. 



The brain is situated at the beginning of the second sixth of the 

 body length, and is unusually clearly bilobed. The accompanying 

 groups of granules (Kornerhaufen) are clearly evident, but the 

 nerves, even in sections, are very indistinct, and accordingly no 

 attempt has been made to determine their distribution. 



The testes are ventrally distributed, but are not clearly united 

 with the sperm capillaries, nor have these last-named canals been 

 seen to unite with the vasa deferentia. Each vas deferens appears 

 to originate at about the level of the male aperture, from which point 

 each pursues its course directly forward as a convoluted, unbranched 

 duct until abreast of the posterior end of the pharyngeal pocket 

 where it bends suddenly inward and backward, finally opening 

 beside its fellow into the small seminal vesicle (PL XV, fig. 24) 

 located immediately posterior to the pharynx. The posterior 

 contracted end of the seminal vesicle is continuous with the immense, 

 spindle-shaped, granular gland whose walls are more or less con- 

 tinuous with the tissue of the penis. The slender penis is of an 

 unusual type in that it is curved upward (PL XVI, fig. 32) and opens 

 into a large cup-shaped cavity that is a dorsal continuation of the 

 antrum masculinum. Several chitin-like spurs project into this 

 space from its anterior wall. Ventrally the antrum is modified to 

 form a long, slender passage, which opens to the exterior ventral to 

 the above-described cavity. 



'he ovaries are in large measure dorsal, and in a few locations 



