262 



convex, well defined pU round by the dorsal furrow, the apex rounded, 

 four or five rings. Side lobes, with four or five broad and short ribs, 

 which extend about half way to the margin. There is a smooth border all 

 round, which is not concave, but apparently slightly convex ; this is 

 extended backwards, and forms the terminal spine. 



The specimen is imperfect at the anterior margin, and it is not quite 

 certain whether there are four or five ribs. 



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

 Quebec group. 



Collector. — J. Richardson. 



Bathyurus breviceps. (N. sp.) 



Fig. 246. 

 Fig. 246. — Bathyurus breviceps, enlarged two diameters. 



Description. — Glabella short and wide, strongly convex, rounded and 

 abruptly elevated in front ; sides, nearly parallel ; neck furrow extending 

 all across. The front margin has a narrow flat rim which is elevated at 

 an angle of about 45^ ; between the rim and the front of the glabella a 

 narrow deep groove. The dorsal furrows are deep, but narrow, all round 

 the glabella. The fixed cheeks are convex. The eye appears to be small 

 and situated about the mid-length, and distant from the dorsal furrows 

 about half the Avidth of the glabella. There are no glabellar furrows. The 

 surface appears to be smooth. 



Length of glabella, 1 line ; width, a little less than 1 line. The 

 groove and marginal rim in front of the glabella occupy about i of a line. 

 Total length of the head, li lines. 



Locality and Formation. — N, Table Head, Newfoundland ; Quebec 

 group. 



Collector. — J. R'.charchon. 



Genus. Bathyurellus. (N. gen.) 



Generic characters. — Trilobites of a medium size, oblong, ovate ; head, 

 thorax, and pygidium, sub-equal ; head convex with the posterior angles 

 sometimes produced backwards into spines ; glabella conical, usually con- 

 vex, and without glabellar furrows ; eyes, lunate ; facial suture in front of 

 the eye curving outwards, then either straight forwards or curving 



