280 



HAPLOMI. 

 ISCHYRHIZA, Leidy. 



Proceedings of tbi; Academy of Philadelphia, 1650,221 ; Cope, Proceedings of the American Philosopliical 



Society, 1872, 354. 



One species of this genus is not rare in the New Jersey greensaud; and 

 a second one has been described from North Carolina, which may be ot" 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 tlie 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. 



L. c, i>. 221. 



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

 IscHYEHiZA ^NTiQUA, Leidy. 



L. (.:, 1656, p. 256 ; Emmous, Geological Survey of North Carol iua, 1856, figs. 47-46. 



? Cretaceous of Neuse River, North Carolina. 



PYCNODONTES. 

 PYCNODUS, Agassiz. 



Poissous fossiles, 16:53, I, p. 10 ; II, p. 163. 



Pycnodus faba, Leidy. 



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

 iig. 16. 



Greensand, No. '?, of New Jersey. 



Incertce secHs. 

 POLYGONODON, Leidy. 

 PoLYGONODON VETUs, Leidy. 



Proceedings of the Academy of Philadelphia, 1656,221 ; Cretaceous Reptiles of the United 

 States, 118, Plato IX, figs. 12-13. 



Greensand of Burlington County, New Jersey. 



