261 



Locality and Formation. — F, Keppel Island ; G, Port aux Choix and 

 Cape Norman ; H, Port aux Choix, Schooner Island, in Pistolet Bay, and 

 Table Head ; N, west side of Pistolet Bay, Newfoundland ; Quebec 

 group. 



Collector. — J. Richardson. 



Bathydrus Timon. (N. sp.) 



Fig. 244. 



Fig. 244. — Bathyurus Timon; pygidium. 



Description. — Pygidium rather strongly convex, semi-elliptical ; length 

 about two thirds of the width ; a smooth, narrow, concave margin all 

 round. Axis concave, semi-cylindrical ; a little less than one third the 

 ■whole width ; gently tapering, obtusely rounded, and abruptly elevated at 

 the apex, with five strong rounded rings, the last two of which are only 

 partially separated ; side lobes with three broad but strongly elevated ribs, 

 the last one sub-triangular. 



In small specimens, the grooves between the ribs are narrow and 

 angular, but with age they become wider and concave in the bottom, as 

 in the above figure. Surface, when well preserved, finely tubercled. 



Associated with these pygidia is a single specimen of a glabella, as 

 strongly convex as that of Menocephalus globosus. From the surface 

 characters, and its occurrence in the same beds, I think it belongs to this 

 species. 



Locality and Formation. — G, H, Port aux Choix, Newfoundland; 

 Quebec group. 



Collector. — J. Richardson. 



Bathyurus caudatus. (N. sp.) 



Fig. 245. 

 Fig. 245.— Bathyurus caudatus ; pygidium, the anterior margin restored. 



Description. — Pygidium strongly convex, with a strong triangular spine 

 behind. Axis conical, a little less than one third the whole width, strongly 



