163 



The following are the species which fall under this genus : Primitia ocu- 

 lata and P. aurora of the Protolenus Fauna and the following species " : 



BRADORIA SCRUTATOR. PL XIII., figs. 1 a to c. 



Bradoria scrutator, n. sp. Nat. Hist. Soc. N.B. Bull. vol. iv., p. 204, pi. 



iv., figs. 1. a to c. 



Can. Rec. Sci. Montreal, 1902, p. 452. 



" Outline of the valves ovate, with a straight hinge-line. Hinge-line Bradoria 

 more than half the length of the valve, terminating in front at a short original^' 

 transverse furrow, situated immediately behind the tubercle. The hinge description 

 is bordered all along its course by a narrow sharp ridge, similar to a mar- 

 ginal ridge. The tubercle is nearly marginal, and is situated just in front 

 of the hinge-line. In front of it the margin of the valve turns downward 

 and is bordered by a narrow, obscure furrow, which extends around the 

 ventral margin of the valve. There is a slight angulation of the outline 

 of the valve at the middle of the anterior border, separating there the 

 cardinal and anterior curves. The posterior margin rounds regularly up- 

 ward behind to the hinge-line. 



Sculpture. (1) The whole surface of the valve is covered with closely set, 

 rather coarse, conspicuous pits that are finer toward the hinge where they 

 have a linear arrangement." On the posterior half, toward the posterior 

 margin, the tubercles between the pits have a tendency to coalesce, and 

 thus produce obscure ridges whose course is directed toward the lower 

 border of the valve. 



Size. Length, 3 mm. ; width, 2^ mm. ; depth, 1 mm. 



Horizon and locality. Assise E. 3. c., Upper Etcheminian, at Dugald 

 brook, Escasonie, N.S. 



Additional material shows, much better the characters of this species. Additional 

 In this the valves have been of a more distinctly oval form than in those c 

 of Bradorona observator, the cardinal curves being rounded so that the 

 straightening of the anterior marginal curve alone defines the length of 

 the cardinal curve above it. The posterior cardinal curve is rounded to 

 the hinge, and the lower edge of the valve is broadly rounded. 



Sculpture. (2) The interior shows a large muscle scar near the hinge- 

 line, behind the ocular tubercle; and also an unusually long straight 

 gi'oove, directed backward and downward, in front of the tubercle ; a 

 fainter, shorter groove directed toward the anterior margin lies in front 

 of this. A thickened band of the shell substance, making a slight ridge 

 11 c. R. 



