82 



EISEN 



thick and rugose postseptal body and short postseptal duct. Lym- 

 phocytes variable, irregularly ovoid, w^ith filamentous ends. Color 

 deep gray. 



Locality. — Metlakatla, Alaska, June 4, 1S99 (under seaweed); 

 also Orca, Prince William Sound. 



Characteristics. — This species and L. merrianii were contained in 

 the same bottle and must have come from the same locality and lived 



Fig. 50. Lumbricillus amiulatus. 



under the same conditions. From L. merria7ni this species could be 

 readily distinguished by its deep intersegmental grooves, which give 

 the body a decidedly amiulated appearance. 



DETAILED DESCRIPTION. 



Sexual pap nice. — They are prominently projecting in all the speci- 

 mens in the collection. The structure of the penial bulb differs little 

 or not at all from that found in other species, except in so far as the 

 bulb seems to be capable of being greatly protruded. 



Septal glands. — These glands, which are of large size, are clus- 

 tered around the septa separating somites IV/V, V/VI and VI/VII. 



Brain. — This organ varies considerably as regards width. Two 

 figures are given of the extremes found by dissection. 



