89 



Description. Conical ; base ovate ; uniformly rounded at the sides and 

 posterior margin slightly narrowed from the middle to the front. Apex 

 nearly central, situated a little in advance of the middle. Surface of the 

 cast vertically marked with obscure concave furrows about one line wide. 



Length of base, 9 lines ; width, 8 lines ; height, 11 lines. 



This species has nearly the form of M. Melissa, but it can be easily re- 

 cognised even in fragments by its sulcated surface. The furrows run from 

 near the apex straight to the base. 



Locality and Formation. Point LeVis ; in limestone Nos. 1 and 2, 

 Quebec group. 



Collectors. R. Bell, J. Richardson. 



METOPTOMA ANOMALA. (N. sp.) 



Fig. 81. o, b. 



Description. The base of this species is oblong and pentagonal, one 

 extremity, supposed to be the anterior, straight, and at a right angle to 

 the sides, the latter nearly straight or gently concave, and parallel or 

 nearly so for two-thirds the length ; when, forming an obtusely rounded 

 angle, they converge to meet in a rounded point in the middle of the 

 posterior extremity. The apex is situated at about one-third the length 

 from the posterior margin, and from this point the anterior portion of the 

 shell is roof-shaped, obtusely carinated, and descending with a flat slope to 

 the sides. On a side view, the outline ascends to the apex with a straight 

 slope, at an angle of about 45 with the plane of the lateral margin ; from 

 the apex forwards it descends with a concave slope for half the whole 

 height, and, just before reaching the anterior margin, becomes parallel 

 with the base. Surface unknown. 



Length 8 lines ; width 5 lines ; height at the apex 3 lines ; height at 

 front margin 1J lines. 



Locality and Formation. Point Le*vis ; in limestone No. 2, Quebec 

 group. 



Collectors. J. Richardson, R. Bell. 



