No. 4.] BILLINGS — FOSSILS OF NEWFOUNDLAND. 473 



Agraulos strenuus, spec. nov. Fig. 10. 



Head (without the moveable cheeks) irregularly quadrangu- 

 lar, broadly rounded in front. Glabella rather strongly convex, 

 conical, variable in its proportional length and width, either 

 smooth or with several obscure impressions on < ach side repre- 

 senting the glabellar furrows ; neck segment wit'i a strong trian- 

 gular projection backwards ; neck furrows all across but usually 

 obscurely impressed. In some specimens the front of the head 

 has a thick, convex marginal rim separated from the front of 

 the glabella by a narrow groove. In others this rim is scarcely 

 at all developed. The eyes, shown by the form of the lobe, 

 appear to have been semi-annular and about one-third the length 

 of the head. The surface appears to be smooth. The following- 

 are the dimensions of the best preserved specimen : 



Length of the head including the large posterior projection, 6 

 lines ; width of the convex marginal rim, 1 line ; width of the 

 groove between the rim and the front of the glabella, ^ of a line ; 

 length of the glabella including the projection, 5f lines ; width 

 of the glabella at the posterior margin, 3 lines ; width of the 

 fixed cheek from the centre of the edge of the eye-lobe to the 

 side of the glabella, 2 lines. A line drawn across the head at 2^ 

 lines from the front margin, would pass through the anterior 

 angles of the eyes. The length of the eye appears to be nearly 

 2 line's. 



As above remarked, this species varies somewhat in its pro- 

 portional length and width, and hence the dimensions, above 

 given, would not be found to be exactly parallelled in all the 

 specimens. 



Occurs in the grey limestone of Topsoil Head and also in the 

 pinkish limestone of Brigus, Conception Bay. 



Agraulos affinis, spec. nov. 



This species is closely allied to A. socialis and is of the same 

 size but differs in the following respects. The glabella is broader 

 and with the sides gently convex. The eyes are somewhat 

 nearer the sides of the glabella. The whole of the anterior por- 

 tion in front of the glabella is convex. The dorsal furrows are 

 more distinctly impressed all around the glabella. 



It occurs at Branch, St. Mary's Bay. 



