I hi 



PALAEONTOLOGY OF NEW YORK. 



och . The fossils originally illustrated in association with this 



S teentl, Kept N. Y. State < lab. Nat. Hist., figs. 4, 5 and 6, lac. cit.), and 



. the publication of the description, regarded as detached caudal 



individuals of the same species, prove to be specimens of the 



/. . Hall. An undescribed species bearing very long and 



,,,/,:;! spines is, however, known to occur in this formation, and it is 



distinct from Ceratiocaris longicavda. This undetermined species is 



the one referred by Clarke {he. cit.) to Ceratiocaris longicaudus. 



. Hamilton group. Genesee shales: Bristol, Ontario county. 



I I IB mocAius Beecheri. 



PLATE XXXI, FIG 3. 



I , lKKB . Bull. U. 8. Geol. Surv., No. 16, Higher Devonian Faunas of Ontario county, 

 N. Y.. p. 44, pi. ii. fig. 1. l sv -">- 



The original of this species consists of the two posterior abdominal somites 

 and the lomen, no additional examples having been observed. The 



specimen has been Battened in a soft shale, and its surface ornamentation not. 

 distinctly preserved. There appear to he no lateral or marginal spines upon 

 the somites and the species is therefore referred to the genus Ceratiocaris. 



' ' the two abdominal somites the anterior is relatively short, with anterior 

 and posterior margins slightly incurved. Its length is 3 mm., and its width 

 mm. The posterior somite is longer, measuring 8 mm. in length and 

 5 mm. in width. The caudal plate is sub-triangular on the dorsal surface; 

 the telson rather stout. Id mm. in length; the cercopods, of which a portion 

 wanting, a little longer. All these spines are carinate, the telson 

 along the middle and the cercopods on their lateral margins. 



In the Cashaqua shales of the Portage group as originally 

 ■ Naples beds," of Clarke). Son Yea, Livingston county. 



