196 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



posterior ends projecting freely backward into the lateral blood 

 lacunae. The cephalic furrows cut into the tissues of the head 

 almost to the position of the brain ; in their posterior portions they 

 are surrounded by a thick layer of small nerve cells; they do not 

 end posteriorly at the exit of the canal leading to the cerebral sense 

 organs, but continue for some distance farther back. The frontal 

 sense organs are very inconspicuous. 



Habitat. — The single specimen represented in these collections 

 was dredged by the Albatross in Bering Sea, August 16, 1890 (Sta. 

 3318; 58° 47' N. Lat., 167° 14' W. Long.) at a depth of 61 fras. 

 Bottom composed of black sand, gravel, and shells ; temperature 

 42° F. 



34. Cerebratulus lineolatus, sp. nov. - 

 PI. 4, fig. 44. 



Body rather slender but of ordinary proportions for genus ; head 

 slender and acutely pointed, not demarcated from body ; cephalic 

 furrows moderately long and very deep, although they extend 

 hardly as far posteriorly as the very large mouth. After preserva- 

 tion both head and body may become comparatively short, the 

 thickest portion of body being immediately behind mouth (PI. 4,. 

 %. 44). 



Length 25 mm. to 20 cm.; width 2-7 mm. 



Color. — General color of body pale gray witli numerous fine,, 

 irregular and much interrupted dark olive brown longitudinal lines 

 extending the length of the body both above and below, but more 

 numerous and larger on dorsal surface than ventrally. There are 

 perhaps 12 of these fine lines, which are often discontinued and 

 often united with adjacent lines (PI. 4, fig. 44). On the head 

 series of elongated dots take the place of definite lines, and in some 

 individuals this is the case over the whole body. The markings 

 have a certain resemblance to those of Eupolia lineolata Burger 

 ('96, PI. 11, Fig. 8). Some individuals resemble Taeniosoma 

 delineaturn rather closely in color. Brain is conspicuous both 

 above and below by its reddish color, which shows through the 

 translucent tissues of the head. 



Markings sometimes entirely disappear after preservation, but in 



