CLASS EEPTILIA. 



SUB-CLASS BATKACHIA, 



FAMILY COLOSTEID^E.— Amphibamus, Colosteus, Sauropleura. 



FAMILY MOLGOPHID.E.— Molgophis, Pleuroptyx. 



FAMILY PHLEGETHONTIIDiE.— Phlegethontia. 



FAMILY PTYONIID.E.— Hyphasma, Oestocephalus, Ptyonius. 



FAMILY TUDITANIDiE.— Brachydectes, Ceraterpeton, Dendrerpeton, Eurythorax, 



Hylerpeton, Hylonomus, Leptophractus, Pelion, Tuditanus. 

 ORDER PROTEIDA.— Cocytinus, Thyrsidium. 

 INCERTJS SEDIS. — Baphetes, Cheirotherium, Clepsysaurus, Collettosaurus, Eosaurus, 



Ornithichnites, Sauropus, Spheropezium, Thenaropus. 



Amphibamus, Cope, 1865, Proc. Acad. Nat. 

 Sci. Phil. [Ety. amphi, both; bama, 

 a step; from its two modes of pro- 

 gressing — swimming and walking.] 



grandiceps, Cope, 1865, Proc. Acad. Nat. 

 Sci. Phil., Coal Meas. [Sig. big- 

 headed.] 

 Baphetes, Owen, 1853, Jour. Geo. Soc. 

 London, vol. 9. [Ety. bapto, I dip or 

 dive — a diving animal.] 



minor, Dawson, 1870, Can. Nat. & Geol., 

 Coal Meas. [Sig. less.] 



planiceps, Owen, 1853, Jour. Geo. Soc. 

 London, vol. 9, Coal Meas. [Ety. 

 flat-headed.] 

 Bkachydectes, Cope, 1868, Proc. Acad. Nat. 

 Sci. Phil. [Ety. brachys, short ; dekles, 

 a biter.] 



newberryi, Cope, 1868, Proc. Acad. Nat. 

 Sci., Coal Meas. [Ety. proper name.] 

 Ceraterpeton, Huxley. [Ety. keras, horn ; 

 erpeton, reptile.] 



punctolineatum, Cope, 1875,OhioPal.,vol. 

 2, Coal Meas. [Sig. puncture-lined.] 



tenuicorne, Cope, 1875, Ohio Pal., vol. 2, 

 Coal Meas. [Sig. slender-horned.] 

 Cheirotherium, Kaup, 1835, in Leonhard 

 und Bronn, Neues Jahrbuch fur Min- 

 eralogie. [Ety. cheir, the hand ; 

 therion, beast.] 



reiteri, Moore, 1863, Am. Jour. Sci. & 

 Arts, 3rd ser., vol. 5, Coal Meas. [Ety. 

 proper name.] 



Clepsysaurus, Lea, 1852, Jour. Acad. Nat. 

 Sci., vol. 2. [Ety. klepsydra, a sand- 

 glass ; saurm, a lizard ; from the com- 

 pression laterally of the vertebra? 

 towards the center.] 



peiinsylvanicus, Lea, 1852, Jour. Acad. 

 Nat. Sci., vol. 2, Coal Meas. [Ety. 

 proper name.] 

 Cocytinus, Cope, 1871, Proc. Am. Phil. Soc. 

 [Ety. kokytos, mythological name.] 



gyrinoides, Cope, 1874, Trans. Am. Phil. 



Soc, Coal Meas. [Sig. like a tadpole.] 



Collettosaurus, Cox, 1873, Geo. Sur. Ind. 



[Ety. proper name; sauras, a lizard.] 



indianensis, Cox, 1873, Geo. Sur. Ind., 

 Coal Meas. [Ety. proper name.] 

 Colosteus, Cope, 1869. Trans. Am. Phil. 

 Soc. [Ety. kolos, short; osteon, a bone.] 



crassiculatus, syn. for C. scutellatus. 



foveatus, 1869, Trans. Am. Phil. Soc, 

 Coal Meas. [Sig. pitted.] 



marshi, see Ptyonius marshi. 



pauciradiatus, Cope, 1874,Trans. Am.Phil. 

 Soc, Coal Meas. [Sig. few-lined.] 



scutellatus, Newberry, 1856, (Pygopterus 

 scutellatus) Proc. Acad. Nat. Sci. Phil., 

 Coal Meas. [Sig. having a shield.] 

 Dendrerpeton, Owen, 1853, Quar. Jour. 

 Geo. Soc, vol. 9. [Ety. dendron, a 

 tree ; erpeton, a lizard ; from the pe- 

 culiar circumstances under which the 

 fossil reptile was found.] 



