572 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



The description of the Judith Eiver formation given in the preceding 

 pages may be summarized in Fig. 4, Plate 31. 



In this section, the beds of the Judith formation are represented with 

 ^ thickness of 332 feet, but, as already observed, they are in some places 

 500 feet thick. The increase is chiefly to be seen in the beds between 

 the first and third sandstones. Hayden gives a thickness of 200 feet to 

 this part of the series, and his subdivision of it differs somewhat from 

 the one 1 have given above. The sections of the overlying beds agree 

 closely in the two accounts, but all the beds are variable according to 

 locality. It is from this part of the series that Dr. Hayden and myself 

 obtained the Vertebrata which give such a decided character to this 

 formation. I now give a list of these, with references. 



REPTILIA. 



DiNOSAURTA. 



Goniopoda. 



Troodon formosus Leidy Proc. Acad. Phila., 1856, p. 72; Trans. Amer. 

 Philos. Soc, 1860, p. 147. This species I did not find. 



Lcelaps cristatus Cope, Proc. Acad. Nat. Sci. Phila., 1876, p. 344. 



Lcelaps falcuhis Cope, 1. c, 1876, p. 249. 



Lcelaps Icevifrons Cope, 1. c, 1876, p. 344. 



Lcelaps explanatus Cope, 1. c, 3 876, p. 249. 



Lcelaps hazeniamis Cope, 1. c. 1876, p. 343. 



LcBlaps incrassatus Cope, 1. c, 1876, pp. 248, 341. 



Aublysodon horridus Leidy, Proc. Acad. Phila., 1868. Dinodon horridus 

 Leidy, 1. c, 1856, p. 72 ; Trans. Amer. Philos. Soc, 1860, p. 143. 



Aublysodon lateralis Cope, 1. c, 1876, p. 248. 



Zapsalis abradens Cope, 1. c, 1876, p. 345. 



Paronycliodon lacustris Cope, I. c, 1876, p. 256. 



The systematic position of this and the last-named genus is uncer- 

 tain. 



Orthopoda. 



Falceoscinciis coskiius Leidy, Proc. Acad. Phila., 1856, -p. 72 ; Trans. 

 Amer. Philos. Soc, 1860, p. 146, exclusive of vertebrae. 



Dysganus peigamis Cope, Proc Acad. Phila., 1876, p. 252. 



Dysganus bicarinatus Cope, I.e., 1876, p. 252. 



Dysganus encausius Cope, 1. c, 1876, p. 250. 



Dysganus haydeniaoius Cope, 1. c, 1876, p. 251. Tracliodon mirabilis, 

 part., Leidy, Trans. Amer. Philos. Soc, 1860, p. 142, pi. ix, figs. 18-20. 



Dicloni'us pentagonus Cope, 1. c, 1876, p. 253. 



Diclonius perangulatus Cope, 1. c, 1876, x>. 254. Tracliodon mirabilis 

 Leidy, 1. c, p. 142, pi. ix, figs. 7-15. 



Diclonius calamarius Cope, 1. c, 1876, p. 255. 



