318 



This species resembles A. platycephalic, but the form of the hypostoma 

 and the absence of a marginal groove on the pygidium appear sufficient to 

 separate it therefrom. 



Locality and Formation. East side of the village of Bedford in the 

 bed of Pike River, and upper end of the island of Orleans; Quebec group. 



Collectors. Sir W. E. Logan, E. Billings. 



ASAPHUS ? CURIOSUS. (N. sp.) 



Fig. 305. 



Description. Pygidium sub-pentagonal, the anterior margin some- 

 what rounded, the anterior angles very largely truncated on a line sub- 

 parallel with the longitudinal axis, a wide shallow concave groove all round ; 

 axis depressed convex in the anterior half, but becoming obsolete before 

 reaching the marginal groove. Surface apparently smooth. 



No perfect specimens of this peculiar fossil have been found, but from 

 such fragments as have been collected it is clearly a new form. The shape 

 of the pygidium, is what the same part of A. platycephalus would present, 

 were its lateral angles cut away to the depth of about half the width of 

 the side lobes. It has also somewhat the aspect of the tail of a Bathyu- 

 rellas. 



It is referred to Asaphus provisionally. 



Locality and Formation. Stanbridge, range 6, lot 20 ; Quebec group. 



Collector. -T. C. Weston. 



BATHYURELLUS EXPANSUS. (N. sp.) 



a. 



Fig. 306. 



Fig. ZQQ.Bathyurellus expansus. a, the glabella, with part of the fixed cheeks ; b, a 

 pygidium, more convex and strongly ribbed than usual. 



Description. Head moderately convex, with a wide concave border. 

 Glabella strongly convex, conical, sides in the posterior half, or two-thirds 

 straight and parallel, in some specimens slightly concave just behind the 

 eyes or between them, the anterior third converging to a narrow rounded 



