ISOT. 



302 



Isotelus gigas. (Asaphus platycephalus.) 



* 4' A 



Jaculus ? hudsonius, Zimm 

 Kennedy cave, Chester Co., Pa 

 Postpliocene ? — See Appendix, 



Enorria aciculatis. Europe. 



Vanuxem^ 

 page 46, 

 fig. 4, 1. 

 Emmons, 

 page 389^ 

 fig, 99, 1. 

 Rogers, 

 p.818,fig. 

 610. Sal- 

 ter and 

 Wood- 

 ward's 

 chart of 

 English fossils, fig. 70. II c. 

 Trenton formation. (DeKay, 

 Ann. L^^ceum Nat. Hist. New 

 York, Vol. I, 1825.) Ill b. 

 Lorraine (Hudson river) for- 

 mation, Rogers, page 819, no 

 figure. He says (in Pennsyl- 

 vania ?) it is rare in the great 

 limestone formation below 

 the Trenton, but becomes 

 abundant in the Trenton. 

 (T, 65.)— lie. 



This ^iant trilobite is three 

 times as large as the figure of 

 it here given. Specimens have 

 been found in Ohio a foot or 

 more long. Fragments of it 

 are numerous in all the out- 

 crops of the Trenton lime- 

 stone formation. Fort Plain 

 in the Mohawk valley is an 

 especially good collection lo- 

 cality. (Vanuxem, p. 47.) 



One jaw found in the Port 

 , Proc. A. P. S. 1871, p. 86.— 



See K. imbricata. XIIL 



