COE: NEMERTEANS OF WEST AND NORTHWEST COASTS. 119 



Size. — Usually 10-30 cm. in length ; 2-4 mm. in diameter. 



Color. — General color of body beautiful cherry red, sometimes 

 inclining to brick red or purplish i-ed, with a series of narrow, pure 

 white rings usually completely encircling the body (PI. 1, fig. 4) . 

 Rings all very narrow, hardly thicker than a thread ; some much 

 finer than others and merely indicated as very delicate hair lines. 

 Large individuals possess 50 to 100 or more such rings, placed at 

 varying intervals throughout length of body. 



Tip of snout provided with a narrow, terminal border of white, 

 fully as conspicuous from ventral surface as from above. When 

 head is extended and obtusely pointed, white marking is angular 

 and extends back on the lateral margins for aboiit half the length of 

 head. AVhen head is contracted strongly the terminal white border 

 appears merely as a short, transverse marking on each side of 

 proboscis pore. First white ring hes in the constricted neck portion, 

 being interrupted by the mouth and therefore incomplete ventrally. 

 Second ring commonly separated from first by two to three times 

 the width of body ; more posterior rings separated from each other 

 by an average distance of a little less than diameter of body in 

 moderate extension ; distance of separation depending largely on the 

 state of contraction of body, var\'ing fully four fold in different 

 states of contraction. Rings often thinner ventrally than above; 

 sometimes extremely fine, sometimes of double lines separated by a 

 very thin Une of the red color of body. 



Ventral surface of a lighter shade than dorsal, and with a grayish 

 tinge. 



Color after preservation in formalin or alcohol dull reddish brown 

 or purplish, with very faint white rings, and Avith abru|)t change in 

 color at the second white ring, the parts anterior being brownish, 

 while those immediately behind the ring are deep purple. White 

 terminal cej)halic border remains conspicuous when body is not 

 strongly contracted. 



In internal anatomy the species presents few deviations from that 

 described for related species of the genus. 



Cephalic glands voluminous, occupying a great portion of tissues 

 of head in front of brain. 



Nephridia. — Excretory tubules limited to third aad fourth fifths 

 of esophageal region ; with several profusely branching tubules ante- 

 riorly which unite farther back into about five to eight longitudinal 



