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, wliile 



Fig. 38. Enchylrcins kincaidi. 



the latter or anterior oi:;£ 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 papillte and a little more 

 ventrally than either. 



Nephridia. — The inner duct narrow, nmning 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 

 (p1. xvm, fig. 3). 



ENCHYTRy^US ALASKA sp. nov. 



pi. I, fig. 19 ; p1. XIX, figs. 4-6 ; pi. xx, figs. i-2 ; text-figs. 39 and 40. 

 Dejiniiion. — Length 15 mm. or less, width .75 mm. Somites 6<,^ 

 strongly tapering toward the tail end. Prostomium rounded ; somite 

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

 somite I. Scta3 straight : anterior laterals 3, posterior 2 ; anterior ven- 

 trals 3, posterior 2 and 3. Sexual papilla) not prominent. Clitcllum 



