280 



HAPLOMI. 

 ISCHYRHIZA, Leidy. 



Proceedings of the Academy of Philadelphia, 185C, 221 ; Cope, Proceedings of the American Philosophical 



Society, 1872, 354. 



One species of this genus is not rave in the New Jersey greensand ; and 

 a second one has been described from North Carolina, which may be of Mio- 

 cene age, or be Cretaceous, but intrusive in Miocene beds. In any case, this 

 or an allied genus is abundant in the Miocene of Maryland ; but the teeth of 

 the species have not yet been obtained. The form, as I have already pointed 

 out, is allied to the living Esox, but is referable to a distinct family (the Ischy- 

 rhizidce), based on the coossification of many of the terminal caudal vertebral 

 centra and spines into a fan-shaped body of considerable strength. 



Ischyrhiza mira, Leidy. 



i.e., p. 221. 



Greensand, No. 5, New Jersey, near Harrisonville. 

 Ischyrhiza antiqua, Leidy. 



L. c, 1856, p. 256 ; Emmons, Geological Survey of North Carolina, 1356, figs. 47—18. 



? Cretaceous of Neuse River, North Carolina. 



PYCXODOXTES. 

 PYCNODUS, Agassiz. 



Poissous fossilcs, 1833, I, p. 16 ; II, p. 183. 



Pycnodus faba, Leidy. 



Report of the United States Geological Survey of the Territories, 4to, I, p. 292, Plate XIX, 

 fig. 10. 



Greensand, No. .'. of New Jersey. 



I nee rlii sedis. 



POLYGONODON, Leidy. 



POLYGONODOJJ VETUS, Leidy. 



Proceedings of the Acadei 

 States, 118, Plate IX 



Greensand of Burlington County, New Jersey. 



Proceedings of the Academy of Philadelphia, 1-56,221; Cretaceous Reptiles of the United 

 States. 118. Plate IX. figs. 12-1::. 



