204 BULLETIN OF THE NATURAL HISTORY SOCIETY. 



Bradoria* n. gen. 



In the Protolenus Fauna are two species of Ostracods, which for 

 want of other known relationship were referred to the genus Primitia. 

 It would appear, however, that in this genus the sulcus which extends 

 from, or near the hinge, downward, should be subcentral. In these 

 two species it is not so, and the depression such as it is, is at or near 

 the anterior end of the hinge line — moreover one of these species (and 

 probably both) is marked by a prominent tubercle, which, from the 

 smoothness of its summit, is supposed to be an organ of vision. It 

 would appear now that these species are representatives of an ancient 

 group of Ostracods which has several specimens in the underlying 

 Etcheminian beds. Though having the general form of Primitia, 

 Primitiella and Aparchites, they do not have the median pit or sulcus 

 of the first, the shallow median depression of the second, or the perfectly 

 smooth valve of the third. Their most marked character is the promi- 

 nence or tubercle just at the front end of the hinge line. Some of the 

 species have close behind this tubercle a short vertical furrow, scarcely 

 extending clear of the tubercle ; or the furrow may pass around the 

 tubercle. In the five species referred here, the marginal furrow is 

 obscure, or invisible along the lower margin. 



The known species are nearly of the same size (about 2£ to 4 mm. 

 long) and the surface of the valves is distinctly pitted, tuberculated, 

 or wrinkled. 



The following new species come under this genus B. scrutator, 

 B. vigilans, B. rugulosus. It includes also Primitia oculata and 

 probably P. aurora of the Protolenus Fauna. 



Bradoria scrutator, n. sp. PI. IV., figs, la to c. 



Valves ovate, with straightened hinge-line, which is more than 

 half of the length of the valve. Furrow short, immediately behind 

 the ocular tubercle. Hinge bordered by a narrow, sharp ridge. 

 Ocular tubercle nearly marginal, and just in front of the hinge. 

 Marginal furrow obscure, extending around the lower margin of the 

 valve. 





* Named from the Bras d'Or, a salt-water lake occupying the interior of 

 Cape Breton. 



