NO. 13 COE : REVISION OF THE NEMERTEAN FAUNA 269 



27. Lineus rubescens Coe, 1904 



(Plate 25, fig. 23) 



L. rubescens Coe, 1905. 



Habitat. Among algae and other growths on rocks and spiles or be- 

 neath stones, near low-water mark and below. 



Distribution. At present reported only from Monterey Bay to San 

 Diego, California. 



28. Lineus torquatus Coe, 1901 



L. torquatus Coe, 1904, 1905, 1905a. 



Habitat. Beneath stones and in mud between tidemarks. 

 Distribution. At present known only from coast of Alaska. 



29. Lineus vegetus Coe, 1931 



(Plate 25, fig. 13; plate 28, figs. 32, 33) 



L. vegetus Coe, 1931, 1932, 1934. 



Body. Very slender in full extension, frequently a hundred times as 

 long as transverse diameter; worm often contracts by coiling in spiral; 

 head narrow, with long cephalic grooves (Fig. 13). 



Size. Length, up to 15 cm; diameter, 0.5-1.5 mm. 



Ocelli. A single longitudinal row of 2-8 small ocelli is situated on 

 each anterolateral margin of head (Fig. 33). 



Color. Usually pale olive brown or reddish brown, darker on dorsal 

 surface, particularly on head; frontal margin and lateral borders of 

 head white or pale gray; brain region rosy; body usually encircled by 

 several to 20 or more very narrow and inconspicuous rings of lighter 

 color, also fine longitudinal line of lighter color often present on each 

 lateral margin of body. 



Young worms and small regenerating individuals white to grayish, 

 with rosy brain and a few small brown ocelli. 



Habitat. Beneath stones, in crevices of rocks, and among corallines 

 and other growths exposed to the full force of the surf. Abundant in 

 many localities. Often found above the middle of the intertidal zone. 



Geographical distribution. At present known only from Monterey 

 Bay, California, and southward to Ensenada, Mexico. 



Remarks. This species frequently reproduces asexually by fragmenta- 

 tion (Fig. 32). The new worms from these regenerating fragments may 



