316 Point Levi Fossils, 



Menocephalus Sedgewicki. N. s. 



Fig. 16 

 Fig. 16. — Menocephalus Sedgewicki. 



Fig. 11. Fig. 18. Fig. 19. 



Fig. 17. — Side view of the head of ilf. globosus. 

 Fig. 18 — Upper surface of the head of M. globosus. 

 Fig. 19. — Menocephalus globosus front view of the head. 



Description. — Glabella very convex, conical gradually taper- 

 ing from the neck segment to the front, which is obtusely round- 

 ed. Neck segment and neck furrow-well defined all across. 

 Two glabellar furrows on each side, which divide the glabella 

 into three pair of lobes, the anterior pairs a little the largest, the 

 other two nearly equal to each other. The posterior furrows 

 sometimes curve so far backwards as to isolate the lobes from 

 the body of the glabella ; their depth, however, is inconsider- 

 able. The glabella is separated from the cheeks and front mar- 

 gin, by the deep, narrow dorsal furrow which runs all round. 

 The eyes are situated opposite the anterior glabellar furrows, and 

 distant from the glabella about ono-fourth the width of the neck 

 segment. The front margin slopes from the front of the glabella 

 downwards, and is then turned up to form a slightly elevated but 

 well defined wire-like rim, which probably runs all round. Sur- 

 face covered with small tubercles. Cheeks, thorax and pygidi- 

 um unknown. Length of largest specimen collected four lines, 

 length of glabella, including neck segment, three lines ; width of, 

 at neck furrow, two lines. 



In some specimens a third glabellar furrow is represented by 

 an obscure indentation close to the front. 



The facial suture is evidently the same as in A. cylindricus 

 and-4. subclavatus. 



Limestone No. 1. 



