ALASKA NEMERTEANS 



21 



occasionally on the shores of England, and C. patagonica Burger, of 

 which a single specimen has been collected from the Straits of 

 Magellan. 



This new species was found by Mr. Creswell Shearer at Albert 

 Head on Vancouver Island. It attains a length of upwards of 600 

 mm. and a diameter of 3-5 mm. Anterior portions of body cylin- 

 drical ; intestinal region much flattened. Head broader than neck, 

 and pointed, rounded or emarginate in front according to the state of 

 contraction (figs. 1 and 2). 



No ocelli were found. 



Fig. 1. 



Fig. 2. 



Figs, i and 2. Carinoma grijfini sp. nov. Anterior part of ventral surface. 

 1. Head extended and pointed. 2. Head contracted and emarginate. X S. 



Color. General color milk-white anteriorly, with brownish mot- 

 tlings farther back ; intestinal lobes darker. After preservation the 

 color is completely lost, and the body becomes nearly cylindrical 

 throughout. 



Body xvalls. In internal organization this species agrees closely 

 with the descriptions which Burger gives of C. armandi 1 and of C. 

 patagonica, 2 but presents a number of peculiarities, which may be 

 stated briefly as follows : Outer integument divided into a superficial 

 and a deeper layer of epithelial cells, separated by a network of con- 

 nective tissue fibers. Basement layer in esophagal region about equal 

 in thickness to the integument itself, but is much thinner farther back. 

 Beneath basement layer in esophagal region is a loose sheet of circular 

 muscles, and beneath this a double set of diagonal muscular fibers. 



1 Fauna u. Flora des Golfes von Neapel, Monogr. 22, Nemertinen, 1895. 

 2 Zeits. f. wiss. Zool., Vol. lxi, pp. 19-20, pi. 3, figs. 1-9, 1S96. 



