COE : NEMERTEANS OF WEST AND NORTHWEST COASTS. 209 



42. Emplectonema biirgeri Coe, 



Proc. Wash. Acad. Sci., 3, p. 25, PL 2, figs. 1, 2; PI. 8, fig. 1 ; PL 

 12, fig. a, 1901 ; Harriman Alaska Expedition, 11, p. 25, 1903. 



Emplectonema violaceum Griffin, Ann. N. Y. Acad. Sci., 11, p. 209, 



1898. Not JE. molaceum Burger. 

 JE. hurgeri Coe, Harriman Alaska Expedition, 11, p. 115, 1904. 



PL 24, figs. 187, 188; Text-fig. 33. 



These worms are long, fiat and ribbon- 

 like, nearly as thick near the lateral mar- 

 gins as in the median line. The color 

 shows considerable individual variation, 

 but most specimens are dark, velvety 

 brown above and flesh colored or 

 creamy white below. Some are mot- 

 tled, reddish brown or purple on the 

 dorsal surface. Sometimes the head is 

 almost without color. Ocelli very nu- 

 merous, commonly numbering 60 or 

 more on each side (PL 24, fig. 187). 

 The worms often attain the length of 

 a meter, and are about 5 mm. in width. 



The proboscis sheath reaches well 

 toward the middle of the body, although 

 the slender proboscis is but a fraction 

 of this length. The armature of the 

 proboscis includes a weak central stylet, 

 the basis of which is swollen into a bulb 

 posteriorly (PL 24, fig. 188; Text-fig. 

 33) and of a pair of pouches, each usi:- 

 ally containing three small accessory 

 stylets. There are 11 proboscidial 

 nerves. Cerebral sense organs remark- 

 ably large ; situated slightly in front of 

 brain. Narrow intestinal caeca extend 

 forward well toward brain. Submuscu- 



FiG. 33. — Emplectonema biirgeri. 

 Outline of stylet apparatus. 



