128 COE 



tudinal and Inner circular layer, with muscular crossings. 



Caudal cirrus present Zygeupolia. 



I. Rather slender, 5 to 8 cm. in length; head pure white, 

 acutely pointed ; esophageal region whitish, pale yellow 

 or flesh color ; intestinal region rose, pale yellow, light 

 brown or chocolate brown from color of intestinal canal. 

 Caudal cirrus slender, white. No retractor muscle to 



proboscis Z. littoralis^ p. i77' 



AAA. Head with deep, horizontal furrows. Proboscis of three 



muscular layers, outer longitudinal, circular, and inner 



longitudinal layers, or of the two former only; muscular 



crossings usually present. 



a. Caudal cirrus absent. Body long and slender, rounded or 



flattened; very contractile Lineus. 



1. Slender, small, visually 10 to 15 mm. long. A single 



row of two to four (rarely six to eight) irregular 

 ocelli on each antero-lateral margin of head. Pink or 

 rosy flesh color, sometimes with tinge of blue ; deep 

 flesh color to purplish brown in intestinal region ; 

 head white L. rttbescens, p. 179. 



2. Up to 12 cm. in length; usually three to seven irregu- 



larly fragmented ocelli on each side of snout. Yellow, 

 sometimes with decided tinge of orange, deep ochre or 

 pale yellow L. Jiavescens^ p. 184. 



3. Large, soft and flabby, up to 50 cm. in length; cephalic 



furrows remarkably long. Ocelli wanting. Dark 

 brown of various shades of color, velvety ; a series of 

 narrow, pale yellow rings, expanded to diamond-shaped 

 spots on dorsal surface, usually encircle body, but may 

 be very inconspicuous. Dorsal surface usually corru- 

 gated longitudinally with series of very delicate, in- 

 conspicuous, longitudinal yellow lines. Tip of snout 

 white, usually with two small orange-colored spots 

 situated in an area of pale yellow on dorsal surface. 



L. pictifrons^ p. 1S8. 



4. Length 10 to 15 cm. or more ; head broad; ocelli want- 



ing. Dark brown with conspicuous median dorsal 

 white or light yellowish stripe which expands on head 

 to form a broad, pear-shaped marking. Usually a 

 faint reddish line extends along each lateral margin of 

 body L, albolineatus, p. 193. 



