286 



The following are the differences : in C. Vulcanus the eye is opposite 

 the front part of the last lobe of the glabella, but in this species it is oppo- 

 site the second ; in G. Mercurius the last glabellar furrows are straight, 

 and extend across. 



Locality and Formation. — P, Cow Head, Newfoundland ; Quebec 

 group. 



Collector. — J. Richardson. 



Cheikurus Poltdokus. (N. sp.) 



Fig. 274. 

 Pig. 274. — Cheirurus Polydorus. 



Description. — Glabella oblong, depressed cylindro-convex, sides straight 

 and sub-parallel, front nearly straight in the middle, angles obtusely 

 rounded, neck furrow extending all across, three glabellar furrows on each 

 side about equidistant from each other, the inner extremities of all being 

 a little more than one-fourth from the sides, and all curving a little back- 

 wards. ' The posterior margin has a smooth rounded rim just within which 

 there is a narrow groove ; outer margin or sides (at least near the angle) 

 with a similar rim ; angles produced backwards with rounded spines the 

 length of which is unknown. Eyes small, opposite the second glabellar 

 lobe from the neck furrow, and about one-fourth the width of the glabella 

 distant from the dorsal furrow. Cheeks closely punctate. 



Length of the best preserved glabella Si lines ; width 4 lines. 



Locality and Formation. — N, Table Head, P, Portland Creek ; Quebec 

 group. 



Collector. — J. Richardson. 



