68 



EISEN 



Sexual glands, The penial papillae on each side consist of two 

 distinct and separate masses of glandular cells arranged in the usual 

 feathery manner characteristic of this genus. There are two agglom- 

 erations of such glands, one anterior to the other, the anterior one 

 being the smallest. In the specimen sectioned longitudinally the 

 former gland-complex is seen to consist of eight agglomerations, while 



FIG. 38. Enckytrceus kincaidi. 



the latter or anterior one contains only three or four. There is, how- 

 ever, some variation, as in one dissected specimen the anterior complex 

 is only one-third smaller than the posterior one. The sperm-funnels 

 are somewhat curved and about three times as long as wide. Sperm- 

 ducts open independently of the penial papilla? and a little more 

 ventrally than either. 



Nephridia. The inner duct narrow, running in a zigzag manner. 

 Sections show that the lumen is connected with innumerable minute 

 and probably branching ducts, too small to be indicated on the figure 

 (pi. xvni, fig. 3) . 



ENCHYTRyEUS ALASKA sp. nov. 



pi. i, fig. 19; pi. xix, figs. 4-6; pi. xx, figs. 1-2 ; text-figs. 39 and 40. 

 Definition. Length 15 mm. or less, width .75 mm. Somites 65, 

 strongly tapering toward the tail end. Prostomium rounded ; somite 

 I smaller than II or III. Head-pore between prostomium and 

 somite I. Seta? straight : anterior laterals 3, posterior 2 ; anterior ven- 

 trals 3, posterior 2 and 3. Sexual papilla? not prominent. Clitellum 



