COE: NEMERTEANS OF WEST AND NORTHWEST COASTS. 181 



50 cm. may have rather more than 40. In many cases, however, the 

 number may appear to be considerably less, due to a more or less 

 complete fusion of several adjacent markings (Fl. 3, fig. 35). 



An interesting case of regeneration of the posterior end of the 

 body, in which it is clearly seen that the characteristic markings are 

 laid down in miniature long before the regenerated portion attains 

 its full size, is shown in PI. 3, fig. 34. This process is thus appar- 

 ently similar to that seen in the regeneration of distinctly segmented 

 worms, such as the annelids. 



Prof. C. B. Wilson describes in his notes the color of the body as 

 bluish brown on dorsal surface with narrow transverse bars of white 

 from 1 to 3 ram. apart ; tip of snout bright vermilion ; lateral and 

 ventral surfaces white, which color also extends to lateral margin of 

 dorsal surface. Found under large stones and among roots of eel- 

 grass at Pacific Grove, California. 



Mr. J. F. Abbott has kindly sent me a colored drawing of a 

 somewhat contracted individual of this species from Pacific Grove, 

 in which the genital pores are clearly shown (PI. 3, fig. 35). 



Sexual products matiire in September in Monterey Bay. Ova 

 large, opaque white. 



Habitat. — Under stones; Pacific Grove, California. Common 

 among kelp hold-fasts attached to stones on sandy bottom in 

 about 2 fms., Monterey, California. In this situation the worms 

 agree almost perfectly in color with the purplish processes of the 

 kelp hold-fasts among which they are entwined. In such cases the 

 worm may lie fully exposed among the purplish root-like processes 

 of the kelp and yet escape detection until it begins to crawl or to 

 move its bright orange snout. Few animals exhibit a more striking 

 protective coloration, and yet they could scarcely be more conspicu- 

 ously colored when removed from their natural surroundings. The 

 worms are often found living in strong, parchment-like tubes, but 

 whether they secrete them or take the tubes of Carinella sexline- 

 ata, with which they are often associated, is uncertain. 



The species has previously been recorded only from Prince 

 William Sound, Alaska (Coe, : 01) . 



Griffin found very small specimens of a somewhat similar species 

 {Linens striatus) in Puget Sound ('98, p. 214), and Stimpson's 

 CerehratuJus ( = Micrura) impressus ('57, p. 160) from Bering 

 Strait, and Cerebratidus ( = Micrura) belhis from Yezo Island, 



