148 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Detailed Description. 



Glands. — There is a pair of small septal glands in VI 

 and VII, about as long as the spermatheca is wide. There 

 is a tiny subpharyngeal gland. There is no septum anterior 

 to that separating VI and VII. 



The gizzard is strongly developed, but confined to somite 

 VI. There are very few and only very small chloragogen 

 cells anywhere. 



The sperm-sacs are all racemose, but the anterior pair is 

 less racemose than the two posterior pairs. All three pairs 

 are postseptal. 



The spermaiheccE are of somewhat less height than the 

 diameter of the body. The anterior pair is considerably 

 narrower than the posterior pair; this is true of both the 

 main sac and the diverticle. In the anterior pair the diver- 

 ticle is of the same length as the main sac, but a trifle 

 straighter and a little thinner. This diverticle is divided 

 up into imperfect chambers, due to some parts of the epi- 

 thelium being longer than others. The posterior diverticle 

 is less marked in this respect. The main sac of the sperma- 

 theca contains a much narrower epithelium, which is smooth 

 and even. The diverticle joins the main sac at the base of 

 the muscular duct. The diverticle of the posterior sperm- 

 atheca is about two-thirds as large as the main sac of that 

 organ. 



The prostates are thin and tubular, but greatly coiled, 

 principally in one plane. The glandular part is perhaps 

 ten times as long as the muscular duct. There are two 

 kinds of cells in the glandular part, but they do not form 

 two distinct layers as in so many other species. The larger, 

 very glandular cells reach from the outer to the inner wall 

 and are only one layer thick. Similarly, the thinner sup- 

 porting cells which separate the glandular cells reach from 

 the inner lumen to the outer surface of the organ, very 

 much in the same way as in some species of Diplocardia. 

 The prostates open slightly dorsal to the penial setae. 



