334 



from about the mid-length backwards and imvards nearly to the neck 

 furrow ; their posterior extremities separated by about one third the 

 width of the glabella. There appears to be an exterior pair represented 

 by a small pit on each side, but this remains still doubtful. 



Length of the only specimen collected 5 lines ; width at the neck fur- 

 rows 3 lines. It is referred to Hm-pides provisionally. 



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

 bed of Pike river ; Quebec group. 



Collector. — E. Billings. . 



DiKELOCEPHALUS ? CORAX. (N. Sp.) 



Fig. 322. 



Fig. 322. — Dikelocephalus? corax. a, the glabella; 6, a pjgidium found associated 

 with a. 



Description. — Glabella obtusely conical, depressed convex, well defined 

 all round by a linear dorsal furrow, gently narrowed from the mid-length 

 forwards ; front obtusely rounded, the greatest width nearly equal to the 

 length. Neck furrow extending all across, on each side of the middle 

 with a slight curve backwards ; the outer extremities curved forwards. 

 There are three pairs of glabellar furrows, the last pair connected across 

 by a straight line in the middle of the glabella ; the other two pairs not so 

 connected ; all inclined forwards and outwards. In front of the glabella 

 there appears to be a wide smooth border. On the neck segment there is 

 a median tubercle. 



The pygidium above figured was found in the same mass of limestone. 

 It is not certain that it belongs to this species. It has a structure allied 

 to that of the pygidium of an Ampliion., and to some extent that of a 

 Bothynotm. 



Locality and Formation. — Point L(jvis, in limestone No. 1 ; Quebec 

 group. 



Collector.— T. C. Weston. 



