718 



BATRACHIA. 



|\KN. CKR. 



surface in part tuberculated. Type T. 

 clarkii, which is described at the same 

 place from the Cleveland Shale. 

 Xknodus, n. gen. [Ety. xenos, strange ; 

 odout, tooth.] Proposed for Goniodus, 

 Newberry, 18S9, Pal. Fish. N. Am., p. 

 67, which was preoccupied among the 

 fishes, by Agassi?., in 1836, and among 

 the Mollusca by Danker, in 1848. 

 Teeth numerous, composing a roughened 

 pavement, small, variable in size and 



form ; generally subtriangular in out- 

 line, depressed, with the central portion 

 elevated into an obtuse angular ridge of 

 denser tissue, and having a polished 

 surface ; other portions of the crown 

 and the lateral margins roughened by 

 a vermicular pitted or corrugated mark- 

 ing ; the lower surface rough and bone- 

 like. Type X. hertzeri, which was de- 

 scribed at the same place from the 

 Ham. (Jr. 



CLASS BATRACHIA. 



Ceratekpeton, Huxley, 1867, Trans. Roy. Irish Acad., vol. 24, p. 354. Type 0. gal van i. 



•o^o* 



GLOSSARY. 



ERRATA. 



Altilis, e— Fattened, instead of flattened. 



Coriformis, e — Heart-shaped, instead of like 

 Coris. 



Cratieulus, instead of C'ratiulus. 



Kugenium, noble; instead of Euginum, fer- 

 tile. 



Macronotus, a, urn — Having a long back, in- 

 stead of long known. 

 Ornogranulus, instead of Ornigranulus. 

 Vadosus, a, um — Full of shallows, instead of 



shadows. 



-O+O' 



INDEX OK GENERA. 



ERRATA. 



Eucsenus, instead of Encsenus. 

 Lithomylacris, /• 

 Mylacris, /. 



Nery mylacris, /. 

 Paromylacris, /. 

 Pro mylacris, /. 



