12 



the middle, narrowly rounded in front, well defined all round by the 

 dorsal furrows. Neck segment strongly convex and bearing a short 

 broad-based spine directed upwards and backwards. Neck furrow extend- 

 ing all across ; the posterior glabella furrow well defined across, forming 

 an obtuse angle backward in the median line ; median glabellar furrow 

 also running across, but not so strongly defined as the posterior ; anterior 

 furrows extending one-tliird across. 



Length of glabella, 2 lines ; width in the middle, about half the length. 



There is no described species to which this one bears any close relation 

 on account of the peculiar character of the posterior and median furrows 

 running quite across the glabella. 



Locality and Formation. Anse au Loup, on the north shore of the 

 Straits of Belle Isle, in limestone of the Potsdam group. 



Collector. J. Richardson. 



CONOCEPHALITES ADAMSII. (N. Sp.) 



Fig. 14. Fig. 15. Fig. 16. Fig. 17. Fig. 18. 



Pig. U.Conocephalites miser. Fig. 15. C.^awmi. Fig. 16. C. Teucer. Fig. 17. 

 C. Vulcanus. Fig. 18. C. arenosus. 



CONOCEPHALITES. ADAMS. Sillimarfs Am. Jour, of Science, 2nd series, vol. 5, p. 109. 



May, 1848. 

 CONOCEPHALITES. BILLINGS. In same Journal, 2nd series, vol. 32, p. 232, Sept. 1861. 



Mso in Can. Nat. and Geol., vol. 6, p. 324, Aug., 1861. 



Description. Head broad, semicircular, moderately convex ; glabella 

 oblong-conical, nearly two-thirds the whole length of the head, the front 

 obtusely rounded or somewhat straight, the anterior angles narrowly 

 rounded, the sides nearly straight from the anterior angle to the neck 

 furrow, just in advance of which is the widest part. The neck furrow 

 well defined all across ; the glabellar furrows indistinct, the dorsal furrow 

 is well defined all round the glabella. The cheeks are moderately tumid : 

 a line drawn across the glabella about the mid-length would pass through 

 the eyes. The distance of the eye from the dorsal furrow is equal to the 

 greatest width of the glabella ; the eye appears to be very small. The 

 margin in front of the glabella is equal in width to about one-third the 

 whole length of the head ; it is bordered by an obtuse narrow elevated 

 rim, just within which is a groove, which is more deeply impressed on each 



