bo 



EISEN 



about one-half to one-third shorter than the funnel. Testes large, fill- 

 ing the whole somite, and consisting of from 12 to 15 lobes, each lobe 

 consisting of about three secondary lobes, each of which terminates in 

 a sperm-cap. Ovaries pluri-lobed, smaller than the testes. Ventral 

 glands all of the same size, about six times as wide as the ventral 

 ganglion, situated in XIV to XVII. Nephridia with small anteseptal 

 consisting alone of the nephrostome. The anterior part of the post- 



septal is cov- 

 ered by wart- 

 like eleva- 

 tions, under 

 which the duct 

 is much twist- 

 ed ; no warty 

 elevations in 

 the posterior 

 part of the 

 postseptal ; 

 stalk short 

 and thick ; 

 duct narrow 

 and difficult 

 to follow. 

 Lymphocytes 



variable, ovoid, more or less pointed. Color of formalin specimens 

 decidedly gray. The body is smooth and rather glossy. 



Locality. — Metlakatla, Alaska, June 4, 1899, Prof. W. E. Ritter. 

 Under decaying seaweeds. A single specimen from Popof Island, col- 

 lected by Prof. Trevor Kincaid. The species is named for Dr. C. Hart 

 Merriam. 



Characteristics . — The specimens which apparently had been placed 

 directly in the formalin solution had not contracted sufficiently to show 

 any deep intersegmental grooves. This characteristic made it easy to 

 pick out the species from others collected at the same time and in 

 the same locality. The intersegmental grooves between the first few 

 anterior somites are dorsally so shallow that it is with difficulty that 

 the somites can be distinguished one from the other. 



Setce. — In the majority of fascicles the setae diniinish toward one 

 side, but while in some the diminution is toward the ventral interval, 

 in others it is toward the lateral interval, following apparently no con- 

 stant rule. 



Figs. 47 and 48. Lumbricilhis merriaini. 



