SOME EOTIFERA FROM SPITSBERGEN. 



319 



Encentrum ferox, E. permolle, E. Hofsteni and E. Coezi. The 

 rami are of semi-circular form, each terminating in two strong 

 teeth, which I thought were jointed and capable of movement 

 in an inward direction. The fulcrum is of moderate length, 

 about as long as a ramus without the terminal teeth. In ventral 

 view it appears slender, but seen laterally it has a breadth at 



Fig. 1. — Encentrum Murrayi, sp.nov. Lateral view (swimming). X 280. 

 Fig. 2. — Posterior end of body, fullest extension. Lateral view. X 500. 

 Fig. 3. — Mastax. Ventral view. X 740. 



the anterior part of about one-half its length. The breadth 

 rapidly decreases towards its lower end. Each uncus seemed to 

 me to have a terminal short tooth jointed to it and to be itself 

 jointed to a long (about 33 /x) and moderately stout manu- 

 brium, which is posteriorly curved inwards and somewhat thick- 

 ened and rounded at the hinder end. Between the uncus and 

 the manubrium is interposed a small hardened piece, making 

 in effect a double joint. The terminal tooth seemed, as well 

 as I could make out, to be turned inwards and to pass between 



