166 



Assise E. 1. d. An imperfectly preserved right valve was obtained 

 here from beds of feldspathic sandy shale. It is considerably smaller 

 than the type, and the surface is rough and dull from corrosion. 



Size. Length of a valve 2| mm., width If mm., depth | mm. 



BRADORIA RUGULOSA, PI. XIII, figs. 3 a to d 



Bradoria rugulosa, n. sp. Nat. Hist. Soc. N. B. 

 Bull, iv, p. 205, pi. in, figs. 3 a to d. 



Can. Rec. Sci. Montreal, 1902, p. 456. 



" A suborbicular species of which only the right valve is known. 

 Tubercle rather prominent, some distance below the anterior end of the 

 cardinal line ; this line is nearly straight and about half of the length of 

 the valve. There is a faint fursow behind the tubercle. A narrow 

 obscure marginal rim appears at the back of the valve. 



Sculpture. The lower slope and the posterior half of the valve are 

 covered with anastomosing ridges, concentric to the upper front part 

 of the valve ; toward the top and front of the valve these ridges become 

 obscure and the surface of the valve is granulated. 



Size. Length 2f mm., width 2| mm., depth less than J mm. 



Horizon and locality. In assise E. 3 e., Upper Etcheminian Fauna, 

 Dugald brook, Escasonie, Cape Breton, N.S. Rare. 



" This little species is easily distinguished from others of the genus 

 by its orbicular form and rugulose surface which is like that of certain 

 trilobites." 



MUTATION. 



A small right valve of the form of this is found in Assise E. 1 c Lower 

 Etcheminian, at Dugald brook. The punctuation is fine and distinct, and 

 the rugulose surface is seen only near the margin of the valve. 



BRADORIA ? ORNATA, PI. XEII, figs. 4 a to c. 



Can. Rec. Sci. Montreal, 1902, p. 456. 



The valves in this species are rather flat and are rounded to the hinge 

 and lower margin, but not much to the ends. 



Only one example known, which is supposed to be a right valve. 



Suboval with a long hinge-line, about three quarters of the length of 

 the valve. Anterior cardinal curve short, posterior longer. Anterior 

 marginal curve long, rounded ; posterior shorter, rounded forward. The 



