267 



Locality and 'Formation. P, Cow Head, Newfoundland ; also, in a 

 boulder near Quebec, with Subulites Psyche and other fossils ; Quebec 

 group. 



Collector. J. Richardson. 



BATHYURELLUS FRATERNUS. (N. sp.) 



Fig. 251. 



Fig. 252. 



Fig. 251. Bathyurellus fraternus. a, the glabella ; 6, the pygidium. 

 252. J5, vnlidus. The pygidium. 



Description. Head strongly convex, with a narrow concave border. 

 Glabella conical, only slightly elevated above the general convexity of the 

 head in the anterior two-thirds, rather strongly elevated in the posterior 

 third, slightly narrowed between the eyes, greatest width at about twor 

 thirds the length from the neck segment, thence with gradually convergr 

 ing sides to the apex which is pointed or very angularly rounded. Dorsal 

 furrow linear, but distinctly visible all round the glabella. Eyes semi- 

 circular, their anterior angles situated just behind a line drawn across the 

 glabella at the mid-length, their centres distant from the sides of the gla- 

 bella about their own length. No neck furrow is visible in the specimen, 

 but this part is badly preserved. 



The pygidium, found associated with the glabella above figured, is very 

 nearly semicircular, moderately convex, and with a narrow deeply concave 

 margin all round. The axis a little less than one-third the whole width at 

 the front margin, and moderately convex, but becomes gradually less pro- 

 minent backwards, until it merges into the general surface at about two- 

 thirds or three-fourths the length. It is crossed by four linear grooves, 

 but the segments between the grooves are scarcely at all elevated. The 

 side lobes have also four obscure grooves, all terminating at the deeply 

 concave marginal border. 



Length of the head 13 lines ; length of the glabella 10! lines ; greatest 

 width of the glabella, at one-third the length from the apex, 6 lines ^ 



