Fossils of the Chazy Limesto?ie. 469 



Harpes antiquatus. 



Description. — Of this species we have only the head, with its 

 horse-shoe-shaped border. The length from the front margin to 

 a line connecting the two posterior points of the border is five 

 lines, and to the posterior margin of the glabella nearly three 

 lines ; the width at the posterior margin of the glabella is five 

 lines and one fourth. 



The head, including all that portion of the border which lies in 

 front of a line drawn across at the posterior margin of the gla- 

 bella is nearly a perfect semi-circle. Behind the same line tbe 

 margin curves inward, so that the two posterior points are only 

 three lines distant from each other. The glabella is small, coni- 

 cal, obtusely rounded in front, strongly convex, with a distinct 

 neck-furrow crossing it close to the margin ; length one line and 

 one fourth, width at base five sixths of a line. There appears to 

 be a small sharp tubercle situated on the neck segment, and also 

 a small rounded lobe on each side of the glabella at the neck 

 furrow. 



The eyes are small, about one sixth of a line in diameter, each 

 apparently situated on the top of a small eminence. A line con- 

 necting the eyes would cross the glabella at about one sixth of its 

 length from the front. The distance between the eyes is about 

 equal to the width of the glabella at the neck segment. 



The upper surface of the border has not been seen, but judging 

 from the lower side, its width must be about one line in a speci- 

 men of the size above described. On the underside it appears to 

 be nearly smooth or minutely granulated, but under an ordinary 

 pocket lens small, closely crowded, circular punctures make their 

 appearance. 



Locality and Formation. — Mingan Islands ; Chazy limestone. 



Collectors. — Sir W. E. Logan, J. Richardson. 



Fragments of another species of Harpes have been found at 

 Montreal, in Chazv limestone. 



Entomostraca (4 species). 



Leperdita Canadensis (var. nana,) (Jones), Beyrichia Logani 

 (Jones), Isochilina Ottawa (Jones), and Leperdita amygdalina 

 (Jones), have been described in Canadian Fossils, Decade 3. 



Annelida (1 species). 



