452 • Canadian Record of Science. 



row may pass around the tubercle. In the five species 

 referred here the marginal furrow is obscure, or in side 

 view along the lower margin, invisible. 



The known species are of nearly the same size — about 

 3 to 4 mm. long — and the surface of the valves is dis- 

 tinctly pitted, tuberculated or wrinkled. The following 

 are the species which fall under this genus. Primitia ocu- 

 lata and P. aurora of the Protolenus Fauna and the follow- 

 ing species." 



Bradoria scrutator. PL II, figs. 1 a to c. 



Bradoria scrutator, n. sp. Nat. Hist. Soc. N. B. Bull, vol 

 iv. p. 204, pi. iv, figs. 1. « to c. 



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

 Hinge-line more than half the length of the valve, termi- 

 nating in front at a short transverse furrow, situated im- 

 mediately behind the tubercle. The hinge is bordered all 

 along its course by a narrow sharp ridge, similar to a 

 marginal 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 ven- 

 tral margin of the valve. There is a slight angulation of 

 the outline of the valve at the middle of the anterior bor- 

 der, separating there the cardinal and anterior curves. 

 The posterior margin rounds regularly upward behind to 

 the hinge-line. 



Sculpture. 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 arrange- 

 ment." On the posterior half, toward the posterior mar- 

 gin 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\ ram ; depth 1 mm. 



