NO. 13 coe: revision of the nemertean fauna 267 



along cephalic grooves. Color retained after long preservation. Mature 

 individuals may reach 50 cm or more in length and 4-8 mm in width. 



Habitat. Beneath stones and in mud and sand between tidemarks and 

 below. 



Distribution. Previously reported from several localities in Chile. 

 Collected by the Allan Hancock Expeditions along the shore at San 

 Juan Bay and at Vieja Island, Independencia Bay, Peru. 



22. Lineus bilineatus (Renier), 1804 



L. bilineatus Mcintosh (1873) ; Joubin (1894); Burger (1895, 1897- 

 1907, 1904) ; Southern (1913) ; Wheeler (1934) ; L. albolinea- 

 tus Coe (1904, 1905). 

 Habitat. Among algae and other growths and beneath stones near 

 low-water mark and below. Often found among kelp holdfasts. 



Distribution. Coasts of Europe, Mediterranean, Madeira, South 

 Africa ; coasts of Alaska, and from Puget Sound to San Diego, California. 



23. Lineus flavescens Coe, 1904 



L. flavescens Coe, 1905; Joubin( ?), 1905. 



Habitat. Among algae and other growths on spiles and rocks near 

 low-water mark and below, particularly among kelp holdfasts and red 

 algae at depths up to 100 m or more. 



Distribution. Southern California to Gulf of California and coast of 

 Mexico. The same or a very similar species has been collected at La Paz, 

 Mexico (Joubin, 1905). 



Regeneration. Posterior regeneration occurs at all levels behind the 

 brain. Anterior regeneration with restoration of a new brain is occasion- 

 ally successful in large portions of the body from which the head has 

 been removed, but complete regeneration of fragments from intestinal 

 region failed in all the experiments undertaken. 



24. Lineus geniculatus (Delle Chiaje), 1828 



L. digueti Joubin, 1905; L. geniculatus Burger, 1895; Wheeler, 1934. 

 The cephalic markings on specimens in the Allan Hancock collections 

 indicate that the peculiarities on which Joubin based the species digueti 

 were within the limits of variability of the species geniculatus. 



