WATERLIME GROUP. 
431 * 
Among the collections made by Mr. Cobb from localities near Buffalo, 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. 
Ceratiocaris maccoyanus (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. 
