WATERLIME GROUP. 4*1 • 



Among the collections made by Mr. Cobb from localities near Bufialo, there are 

 fragments of a species of this genus, and two specimens lying in such a position that 

 we may suppose the carapace to have separated on the lower side, and the abdominal 

 and caudal portions to have been folded forward between the valves of the carapace, 

 leaving the tail-spines projecting beyond the anterior end. 



Cerafiocaris maccoyanas ( n. s.). 



Plate LXXXIV. Fig. 1-5. 



Carapace (lateral view) subovate, a little more than twice as long as 

 wide, obtusely pointed anteriorly, and obliquely truncated behind : 

 basal margin gently curving from the basal posterior edge to the an- 

 terior end. The carapace appears to be composed of two valves, an- 

 chylosed along the dorsal line, in the perfect condition. The articula- 

 tions near the tail are narrow and long, the spines short, and the upper 

 or dorsal one is little longer than the lower one, while the latter ap- 

 parently closes in a groove or depression between the other two. The 

 surface of the carapace is concentrically striated. 



Fragments of five individuals of this species are known : two of them preserve 

 the carapace; and the three others are the posterior joints, with the tail-spines 

 partially or entirely preserved. 



Fig. 1. A specimen preserving the tail-spines, several articulations of the body, and a part 

 of the carapace, the body having been folded between the valves of the latter. 



Fig. 2. A specimen in similar condition, preserving one side of the carapace more nearly 



entire. 

 Fig. 3. A fragment preserving the tail-spines, with two or three of the articulations. 



Fig. 4. A similar fragment. 



Fig. 5. A similar but larger fragment. 



Geological position and locality. In the Waterlime group, near Buffalo. 



