28 



fourth the width. The first pair enter just l)ehind the anterior angles, and 

 extend inwards and backwards at an angle of about 45 deg. with the lon- 

 gitudinal axis. The second pair are at about the mid-length, not so deep 

 as the first, extending inwards nearly at a right angle but still curving a 

 little backwards. The third pair are situated at about one-fourth the 

 length from the neck-furrow ; they are like the second, but seem to be 

 deeper inwards. The glabella is strongly convex, nearly hemispherical, 

 greatest elevation on a line with middle pair of furrows. A short stout 

 spine rises from the back part, just between the two posterior glabellar 

 lobes and behind the last pair of furrows. It extends nearly horizontally 

 backwards, but sloping a Httle upwards. Fixed cheeks tumid ; the eyes 

 are small and about opposite or a httle in advance of the second pair of 

 furrows. Posterior margin of head, neck segment, movable cheeks and all 

 other parts unknown. Length of glabella from the neck-furrow to the 

 front margin 4 lines ; greatest width about the same ; distance of the eye 

 from the side of the glabella 2 lines. Surface coarsely tuberculated. 



This species is allied to Splicer exochus cephaloceras, Nieskowski, but has 

 the glabella more nearly circular and the spine more elevated. It difiers 

 too widely from C. perforator^ 0. Glaueus, and C. Satyrus, B., Pal. 

 Foss., to need comparison. Enghsh Head ; H. R. 



Genus Proetus, Steininger. 



P. Alaricus, B., Can. Nat. Geol. v. 68, Charleton Point and Enghsh 



Head ; H. R. 



Genus Harpes, Goldfuss. 



H. Ottawaensis, B., Pal. Foss., vol. i, p. 182, English Head and 

 Wreck Point ; H. R. The specimens are imperfect, and although the up- 

 per parts of the cheeks are not so densely punctate, yet, as the proportions 

 are precisely the same as those of the typical specimen from the Trenton 

 limestone, it seems the better course to refer them to this species for the 



present. 



Genus Calymene, Brongniart. 



C. Blumenbachi, Brongniart. — Charleton Point ; H. R. Also in Divs. 



1,2,3,4, A. G. 



Genus Leperditia, Roualt. 



L. Canadensis, Jones. — Occurs at Charleton Point ; H. R. The variety 

 L. Anticostinia is found at East Point ; Div. 3, A. G. 



