NIAGARA FALLS AND VICINITY 



227 



Genus ceratiocaris McCov 



[Ety. : xspdnov, pod; -/.apt?, shrimp] 



(1849. Ann. mag. nat. hist. ser. 2, 4:412) 



Carapace consisting of a smooth, pod-shaped bivalved 

 out eye nodes. Valves of 

 carapace elongate, subovate, 

 or subquadrate, truncated be- 

 hind. A free lanceolate ros- 

 trum occurs. Body of 14 or I I 

 more segments, of which from 

 four to seven extend beyond 

 the carapace. Some of these 

 have obscure branchial ap- 

 pendages. Telson a long, 

 pointed spine, with two smaller 

 lateral spines (cercopods) ar- 

 ticulated to it. 



Ceratiocaris acuminata Hall 



(Fig. 159) (i859- PaL N. Y. 

 3 1422, pi. 84) 



Distinguish ing characters. 

 Carapace large ; tapering in 

 front, broad medially and 

 rather abruptly truncated on 

 posterior margin. Surface with 

 very fine, raised longitudinal 

 lines. Penultimate segment 

 long; telson and cercopods 

 short. 



Found in the Waterlime 

 beds of North Buffalo. 



Ceratiocaris (Phasganoca- 

 ris?) deweyi Hall (Fig. 160) 

 Onchus deweyi Hall 

 (1852. Pal. N. Y. 2:320, pi. 



Distinguishing characters. 

 Large spine of telson only 



shell, with- 



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