220 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



The species of this genus sliow considerable resemblance to 

 those of Empleotonema Stimpson. They differ, however, in gen- 

 eral shape and appearance of body, never being very long or slender, 

 and individuals do not coil their bodies into a mass as those of 

 Emplectonema are so prone to do. The proboscis is much larger 

 and the central stylet is always well developed. The proboscis 

 sheath is also much longer. In many respects the genus resembles 

 Amphiporus. The body is much longer, however, and not nearly 

 so contractile, the proboscis is not nearly so large, and the proboscis 

 sheath is not so long. The armature of the proboscis resembles 

 that in some species of Amphiporus. 



Paranemertes is known only from the Pacific coast of North 

 America, wliere it is represented by at least foiir species, none of 

 w^hich have been recorded from other parts of the >vorld. 



48. Paranemertes peregrina Coe. 



Proc. Wash. Acad. Sci., 3, p. 33, PL 2, tig. 6; PI. 3, %. 5, 1901 ; 

 Harriman Alaska Expedition, 11, p. 33, 1904. 



PL 1, figs. 7-9; PL 16, tigs. 95, 96; PL 17, tig. 103; PL 24, tig. 

 192; PL 25, tigs. 198, 199; Text-tigs. 37, 38. 



This is one of the commonest and most widely distributed species 

 of nemertean found on the Pacitic coast. 



The worms may be recognized by the rather slender body of a 

 purplish brown, dark brown or orange brown color above, on the 

 sides, and on the margins of the ventral surface, while the median 

 third, or a little more, of the ventral surface is white, yellowish 

 white or deep yellow (PL 1, tigs. 7-9). There is a narrow, but con- 

 spicuous V-shaped white marking just back of the head. This is 

 placed symmetrically on the dorsal surface with the angle directed 

 backward. There is also a pair of yellowish spots, continuous with 

 the color of ventral surface, on each lateral margin in front of 

 brain. 



The head is usually broader than the parts following, and is com- 

 monly sharply truncated, A pair of delicate, whitish, transverse 

 grooves lie on the lateral margins of the head (PL 1, tigs. 7, 8). 



