COE: NEMERTEANS OF WEST AND NORTHWEST COASTS. 99 



below, sharply marked off from rosy color of body ; 

 often with bluish tinge after preservation. 



L. ruhescens, p. 164. 



CC. Caudal cirrus present ; proboscis sheath usiially extends nearly 



or quite to posterior end of body . . . . E. 



E. Body rather firm, lateral margins "! not remarkably thin; 

 incapable of swimming ; neurochord cells absent in man} 

 species ...... Micrura, p. 177. 



a. Body with conspicuous transA'erse rings of white. 



1. Body rounded; deep purple or reddish brown above, 



with a series of narrow transverse rings throughout 

 length of body ; pure white beneath and on lateral 

 margins of body ; tip of snout deep^orange or vermil- 

 ion ; caudal cirrus white, conspicuous. 



M. rerrilli, p. 179. 



2. Body flattened, dusky gray aliove with narrow, colorless 



transverse bands and a flesh-colored subtriincate head. 



M. hnpressa, p. 182. 

 aa. Body without conspicuous transverse rings . . b. 



b. Dorsal surface M'ith conspicuous spots and blotches. 



1 . Body rather stout, much flattened ; color pale yellow, 



thickly covered on dorsal surface only with black or 

 dark brown spots and dots often somewhat elongated 

 and arranged in irregular longitudinal lines ; a single 

 row of 10 to 18 ocelli on each side of head ; 

 nephridia limited to middle third of esophageal 

 region .... M. partialis, ]). 183. 



2. Body grayish after preservation (color in life un- 



known), thickly mottled on lioth dorsal and ventral 

 surfaces with coarse confluent brownish blotches, 

 which often fuse together posteriorly to form a con- 

 tinuous brownish color ; laephridia extend forward 

 to mouth region . . . M. nebulosa, p. 190. 



bb. Body without distinct spots . . . . . c. 



c. Color rosy, flesh color or red ; ocelli wanting. 



1. Body deep red, sometimes purplish in esoidiageal region 



and brighter red anteriorly; head briglit red with a 

 narrow, but very sharp and conspicuous, transverse 

 band of white just l)ehind tip of snout, which is red 

 with a small, dark bi-own or black spot on the exact 

 tip ..... J/, riif/rirostris, p. 178. 



2. Body rosy, pinkish red or dull red with purplish tinge 



in esophageal region, becoming gradually paler towards 



