Cope.] 57o rpy,3 3 



foreami, or are a jiair of short ribs. Impressions only of the teeth rcmaia ; 

 they indicate small pleurodont denticles like those of the Anura. 



Measurements. M. 



Length of cranium above 029 



Width " " 037 



" between epiotic angles 018 



" of interorbital space 007 



" orbit 006 



Length" " 007 



" skull to fontanellc 008 



" " from orbit to nares 005 



" " " '• to end of snout 003 



" " lateral pectoral shield 015 



"atlas 004 



Width " " 004 



This species of Tuditawis differs from the T. radiatus in the larger and 

 less anteriorly placed orbits, and in the large truncate posterior table of the 

 skull. The proportions of the latter arc more those of P. obtitsus, but the 

 epiotic angles have not been observed in this species, the sculpture is punc- 

 tate not linear, and the form of tlie supraoccipital is quite different. Com- 

 parison with the other species referred to that genus is unnecessarj', ex- 

 cepting in the case of the T. mordax. Further examination of the speci- 

 men on which the latter was founded leads to the belief that it is an imper 

 feet cranium of Ceraterpeton punctoUneatmn Cope. The latter name, as the 

 preferable one, may be adopted, and the former becomes a synonym. 



CoLOSTEUS scuTELLATus, Newberry; Cope, Rept. Geol. Surv. Ohio, 

 Paleontology Vol. II, p. 407. 



Another specimen of this species was obtained by Prof. Newberry during 

 the past season, which includes some parts of the skeleton not previously 

 observed. 



The specimen presents a superior view of the ventral and thoracic pro- 

 tective armature, and of the posterior portion of the cranium. As hereto- 

 fore, I find no indications of vertel)ra\ but along one side of the ventral 

 scutellation, a series of slender ribs lies in the matrix. These I have not 

 previously found in this genus. The cranial surface is only preserved on 

 the lateral portions. lis sculpture consists of coarse grooves closely placed, 

 directed outwards and forwards. 



