70 



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. f}iccbii^and. I contend that they are characteristic of 

 this genus. 



Fig. 40. EnckytrcEus alaskce. 



ENCHYTR^US SAXICOLA sp. nov. 



pi. XVIII, 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. Setce straight : laterals, 

 3^ 3r 3' 3' 3' 3i 3' 3^ 3i 3^ 2, 2 (15 somites), 3, 3, 3, 3, etc. ; ventrals, 

 3' 3' 3' 3' 3' 3' 3' 3^ 3' 4^ o, 2 (12 somites), 3, 3, 3, etc. Clitellum 



Fig. 41. EtichytrcEus saxicola. 



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- 

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



