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, i and 2). 



No ocelli were found. 



Fig. I. 



Fig. 2. 



Figs, i and 3. Carinoma griffini sp. nov. Anterior part of ventral surface. 

 1. Head extended and pointed. 2. Head contracted and emarginate. X 8. 



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 walls. — In internal organization this species agrees closely 

 with the descriptions which Burger gives of C. armandp and of C. 

 patagonica^ 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. 



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

 *Zeits. f. wiss. Zool., Vol. Lxi, pp. 19-20, pi. 3, figs. 1-9, 1896. 



