366 Fossils of the Calciferous Sandrock, 



BATHYURUS CTBELE, (N. £.) 

 Fig. 12, c. 



Description. — Of this species the glabella only lias been found 

 It is slightly clavate being a little wider near the front than it is 

 at the neck furrow ; it is convex, with an elevated rounded front ; 

 two obscure barely visible lateral sulci not reaching the centre ; 

 one of these furrows is at about one third the length from the 

 neck furrow, and the other at two thirds ; they slope forward 

 and outward at an angle of about 55° ; the neck furrow is deep 

 concave, and with a forward sinus in the middle. The surface is 

 covered with small tubercles. The front of the glabella is slightly 

 produced into an obtuse scarcely visible, rounded lobe one third 

 the whole width. Length nearly five lines, width four lines. 



Locality and formation — Mingan Islands, White limestone. 



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



BATHYURUS CONICUS, (N. S.) 

 Fig. 12, d. 



Description. — Glabella conical rather strongly convex, with a 

 deep neck furrow and a deep sulcus all round, covered with small 

 sharp tubercles distant from one fifth to two fifths of a line from 

 each other. In the specimen a small portion of the anterior 

 margin of the cephalic shield in front of the glabella is preserved. 

 It seems to shew that the whole head was surrounded by a deep 

 marginal furrow. Length of glabella including neck segment 

 five lines and a half; width at neck segment four lines. The 

 most striking features are the regularly conical shape of the 

 glabella and the tubercular surface. The margin in front of the 

 glabella is two lines wide. 



In the same rock and near the same locality, the cheek piece 

 of a trilobite was found with a tubercular surface, and with the 

 posterior angle produced into a short spine. It probably belongs 

 to this species. 



Locality and formation. — Near Beauharnois, Calciferous Sand- 

 rock. 



Collector. — J. Richardson. 



ASAPHUS 



A single fragment of a large Asaphus was collected at the 

 Mingin Islands in the Calciferous Sandrock. 



