182 



This species very closely resembles L. JuTcesii from tte Quebec group, 

 but in that sjiecies the middle lobe is expanded at the neck-furrow and 

 contracted in the mid-length. 



Liii'itlitii and Formation. — In the white hmestone on the south side of 

 Large Island, Mingan Islands ; Chazy, or Black River. 



CiAlcdors. — Sir W. E. Logan, and J. Eichardson. 



Remopleuridbs Canadensis. (N. sp.) 



Pig. 164. 



Description. — Head gently convex, somewhat abruptly elevated in front; 

 width of space between the eyes equal to the length of the head, neck 

 segmcni: well defined by the neck furrow, and with a tulierclc in the middle. 

 The eyes are two->thirds the length of the head ; their posterior and ante- 

 rior corners at about an equal distance from each other (two-thirds the 

 length of the head) ; the median projection of the glabella in front of the 

 eyes is about one-fifth the length of the head. Surface under the lens 

 finely tubercular. There are two pairs of very obscure glabellar furrows, 

 and two smooth lines behind them representing the third or posterior pair. 



Length 4 linos ; length of the eyes 2f lines. Only one specimen of 

 this species has been collected. 



Lo' ,jJif!/ a ad Formation. — Front concession of the Township of Clarence ; 

 Chazy. 



OuUcctor.^.J . Richardson. 



Harpes Ottawaensis. (N. sp.) 



Fig. 165. Fig. 166. 



Fig. 165. — Harpes Ottawaensis. 



166. — H. Dentoni. the glabella distorted in posterior half. 



Description. — Head strongly convex with a wide punctured border, 

 which extends backwards to about the thirteenth segment of the thorax. 



