ENCHYTR^EID^E 



SYNOPSIS OF SPECIES OF ENCHYTR^EUS DESCRIBED IN THIS PAPER. 



I. SPERMATHECA WITHOUT DIVERTICLES. 



Spermatheca more or less covered with small glandular cells. No distinct 

 and enlarged pouch ............................................. i. E. modestus sp. nov. 



Spermatheca short and thick, with a large collar of glands at the base. 

 Spermathecal connection with the intestine is situated on the side of the 

 Spermatheca. Two large glandular penial papillae at the penial pore. 



2. E. metlakatlensis sp. nov. 



II. SPERMATHECA WITH A SINGLE DIVERTICLE. 



Spermatheca short and thick. The connection with intestine is situated on 

 one side of the Spermatheca. Two separate penial papillae near the spermi- 

 ducal pore. A few small glands around the base of the spermatheca. 



3. E. kincaidi sp. nov. 



III. SPERMATHECA WITH TWO DIVERTICLES. 



Spermathecal diverticles distinct, both of the same size. Stalk of spermatheca 

 longer than the ampulla. A large number of penial papillae near the sper- 

 miducal pore covered by the regular muscular layer of the body. 



4. E. alaskce sp. nov. 



Spermathecal diverticles of unequal size. Brain deeply emarginated pos- 

 teriorly. Sperm-funnels very long and narrow. Penial papillae two, and 

 very minute, situated close to the spermiducal pore.. ..5. E. saxicola sp. nov. 



Spermathecal diverticles unequal in size. Brain posteriorly convex. Sperm- 

 funnels short and twisted. Two small penial papillae near the pore. 



6. E. citrinus sp. nov. 



ENCHYTR^US MODESTUS sp. nov. 



pi. xix, figs. 2 and 3 ; text-fig. 33. 



Definition. Length 6 to 7 mm., width .4 mm. Somites 57, 

 pluri-ringed. Prostomium pointed, about one-third shorter than somite 

 I. Intersegmental grooves deep. Setae straight and of equal length, 

 three in each fascicle, dorsal as well as ventral. Brain posteriorly 

 almost straight, the posterior retractor muscles much narrower than 

 the lateral 

 ones. Dorsal 

 vessel rises 

 posterior to 

 clitellum (un- 

 developed in 



' d 



the speci- 



mens) . Sper- 



mathecse with- 



out diverticles, 



straight and 



more or less 



warty, not 



connecting with the intestine. Nephridia with exceedingly narrow 



inner duct rilling only a small part of the nephridium ; the anteseptal 



Enchytrceus modestus. 



