64 CANADIAN MICRO-PALyEONTOLOGY. 



micaceous, shaly mudstone, somewhat ferruginous) at Broad street, 

 A3^1mer, Quebec; in the Trenton Limestone at the Lorettc Falls, Kiver 

 St. Charles, and in Chazy (?) Limestone at Quebec, south of Montcalm 

 Market, where they were collected by Messrs. Sowter and Ami. 



At first sight these and others, more or less obscured by imbedment 

 or imperfection, passed for long varieties of P. mundula, but after pro- 

 longed and repeated examination they evidently fell into another 

 group. 



4. Primitia mundula, Jones. Yar. eppossa. (nov.). 

 PI. 10, fig. 8. 



Length I'O (hinge-line "76), height -6 mm. 



Of the four or five Prlmitlce in the dark, fine gi'ained Chazy (?) lime- 

 stone from the south of Montcalm Market, (Quebec City (coll. Mr. H. M. 

 Ami and Mr. N. J. (firoux), this is one of the least imbedded specimens, 

 and has a simple, suboblong, bean-shaped form, straight on the back, 

 fully rounded behind, but with a short, sloping curve in front, continued 

 on the antero-ventral margin, so that the front is not quite so high as 

 the hinder part of the valve. Surface smooth, impressed with a nar- 

 row dorsal sulcus, running into a large oval central pit, which has 

 swollen sides. A narrow, flattened rim is traceable along the free 

 margin much more distinctly in some specimens than in others. 



This is related to both Primitia Logani and P. mundula, Jones, but 

 its high convexity separates it from the former, and its relatively 

 elongate shape, and its large oval pit and almost closed sulcus are 

 features distinguishing it from the latter type and making it a notice- 

 able variety. It may be known as P. mundula, var. eppossa. It is 

 referred to at p. 553, Quart. Jour. (feol. Soc, vol. XL VI. 



A similar dark coloured, fine grained limestone near the Drill Shed 

 in Quebec contains several small, obscure Primitire, which, perhaps, 

 belong to P. mundula. These were collected by Mr. II. M. Ami, in 

 1888. 



5. Primitca mundula, Jones. Var. incisa (nov.). 

 PI. 10, figs. 9 a, b, and c. 



Length *80 (hinge-line "66), height -53 mm. 



In dark grey, hard Trenton Limestone (with encrinital joints and 

 small brachiopods), from Lorette Falls on the Kiver St. Charles, Pro- 



