EISEN 



seen a number of smaller glandular papillae in a continuous row across 

 the somite. Somewhat similar structures have been figured by 

 Michaelsen for E. mcebu, and I contend that they are characteristic of 

 this genus. 



FIG. 40. Enchytrceus alaskce. 



ENCHYTR^EUS SAXICOLA sp. nov. 



pi. xvin, fig. 6; text-fig. 41. 



Definition. Length 15 to 20 mm., width .65 mm. Somites 63. 

 Body transparent, with thin walls. Prostomium blunt and rounded. 

 Head-pore between prostomium and somite I. Setae straight : laterals, 

 3, 3i 3 3> 3> 3> 3> 3> 3i 3> 2 2 ( J 5 somites), 3, 3, 3, 3, etc. ; ventrals, 

 3 3 3^ 3> 3 3^ 3^ 3 3> 4 2 ( I2 somites), 3, 3, 3, etc. Clitellum 



FIG. 41. Enchytrceus saxtcola. 



XII and XIII, prominent. No external sexual papillae. Brain pos- 

 teriorly deeply emarginated, longer than broad. Dorsal vessel rises 

 posteriorly. Intestine much narrower in somites VII to X. Sperma- 

 thecae short and thick, each with a single diverticle ; connects centrally 



