Point Levi Fossils, 319 



the largest specimens, is one line and one-third. Cheeks, tho- 

 rax and pygidium, unknown. Surface apparently smooth. 



Length of large head, thirteen lines ; width of glabella, at 

 base, nine lines, and at two lines from the front margin, eight 

 lines. 



Limestone, No, 1. 



Bathturus dubius. N. s. 

 Fig. 21. 



Description. — This species differs from B. capax in having the 

 glabella raore pointed, and narrowly rounded in front, and the 

 marginal rim not flat but of a sub-cylindrical wire-like form. 



Length of head in largest specimen seen, nine lines ; width of 

 glabella at neck furrow, six lines and a half, and at two lines from 

 front margin, five lines. 



Limestone, No. 1. 



Bathyurus bituberculatus. N. s . 

 Fig. 22. 



Description. — Glabella the same as in B. dubius, but more 

 pointed in front, and with an elongate-oval tubercle or lobe on 

 each side of the posterior half. These tubercles are of an elon- 

 gate oval form, pointed at both ends, bounded on the outside 

 by the dorsal furrow which runs all round the glabella, and on the 

 inside by a shallow, rather obscure groove, but which seems to 

 separate them completely from the main body of the glabella. 

 The lower pointed extremity of each, terminates a little below 

 the level of the neck furrow, and the upper, a little behind the 

 mid-length of the head. 



Length of largest head seen, eight lines and a half; width of 

 glabella just behind the neck furrow six lines ; length 

 of each tubercle two linees and a half; width of same in the 

 middle one line. Surface smooth. 



Limestone, No. 1. 



Bathyurus armatus. N. s. 



Fig. 23. 



Description. — Head very convex, with a strong broad-based 

 spine projecting backwards from the neck segment. The contour 

 of the glabella is obscurely indicated by two faint grooves which 



