15 



CONOCEPHALITES ARENOSUS. (N. Sp.) 

 Fig. 18. 



Description. Glabella conical, about three fourths the length of tho 

 head, convex, well defined by the dorsal furrows all round, neck furrow 

 all across, posterior glabella furrows represented by obscure indentations 

 which appear to be directed obliquely backwards from near the mid- 

 length to near the neck furrow ; there appear to be no median and ante- 

 rior furrows. Front margin with an elevated rostrum and a transverse 

 groove, the latter passing at about one third from the front of the gla- 

 bella. Ocular ridge well defined. 



Length of head 3J lines ; of glabella 2^ lines ; width of glabella at 

 base If line ; at one third the length from front 1J line. 



Another head is 4J lines in length. 



The characters of the impressions taken to be the posterior glabella 

 furrows are not well ascertained. 



Locality and Formation In thin bedded, flaggy sandstone by the 

 side of the road leading from Moore's Corners in St. Armand to Saxe's 

 Mills in Highgate, Vermont, about one mile south of the Province line. 

 Potsdam group. 



Collector. E. Billings. 



BATHYURUS SENECTUS. (N. sp.) 



Fig. 19. Fig. 20. Fig. 21. 



Fig. 19. Head of B. senectus. Fig. 20. Supposed pydigium of the same. Fig. 21. 

 B. parvulus. 



Description. Glabella sub-cylindrical, clavate, strongly convex, one 

 fourth wider at the front margin than at the neck segment, sides nearly 

 straight, front obtusely rounded and presenting a strong convex elevation, 

 neck furrow extending all across, three pairs of glabella furrows repre- 

 sented by small but distinct and obtuse indentations in the sides. Fixed 

 cheeks rather strongly convex. Eyes of moderate size, semicircular ; a 

 line drawn across the head at about one third the length of the glabella 

 from behind would pass through them, and they are distant from the side 

 of the glabella about the width of the neck segment. The front of the 

 head is surrounded by a narrow border which appears to be flat ; there 

 appears to be some evidence of a spine on the neck segment. 



