89 



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

 posterior margin slightly narrow«d 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 ftirrows run from 

 near the apex straight to the base. 



Locality and Formation. — Point L6vis ; in limestone Nos. 1 and 2, 

 Quebec group. 



Collectors. — R. Bell, J. Richardson. 



Mbtoptoma anomala. (N. sp.) 



Fig. 81, a,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 tbe 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 mar^, becomes parallel 

 with the base. Surface unknown. 



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

 front margin 1^ lines. 



Locality and Formation.— VdiiA L^vis ; in limestone No.^ 2, Quebec 

 group. 



Collectors.-^. Richardson, R. Bell. 



