I70 



THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. 



described as Leptophractus lineolatus are, however, unlike any other skull remains which are 

 thus far known. 



' ' This species represents one of the largest types of the Carboniferous Amphibia of 

 Ohio. It probably attained a length of several feet. It was also the most carnivorous of 

 any of the forms." 



Measurements of the Type Specimen of Leptophractus lineolatus Cope. 



mm. mm. 



Length of specimen, as preser\'eil 98 Length of longest tooth in jaw 22 



Depth of dentary bone at tlie middle 30 Anteroposterior di.imeter of the same at base 6 



Anteroposterior diameter of mandibular tooth at I.«ngth of small maxillar>' tooth 7 



base ^-5 Anteroposterior diameter of same at base 2 



Length of a posterior mandibular tooth 9 



Collected by Dr. J. S. Newberry. Other specimens of the species are Nos. 

 1086 G and 1087 G, American Museum. 



Eurythoraz sublaevis Cope.* 



Cope, Proc. Am. Phil. Soc., p. 177, 1871. 



Cope, Geol. Surv. Ohio, 11, pt. 11, p. 401, pi. xl, fig. 4, 1875. 



Type: Specimen No. 8605 G, American Museum of Natural History. Collec- 

 tion of Dr. J. S. Newberry. 



Horizon and locality : Linton, Ohio, Coal Measures. 



The genus and species were established on a single, large, almost perfect inter- 

 clavicle of peculiar form. It may or may not be distinct, but it can not be asso- 

 ciated definitely with any known genus, so that 

 it will be designated as Cope described it. It 

 exhibits on its outer or lateral borders broad, 

 smooth surfaces for the contact of the overlapping 

 margins of the lateral plates. The form is sub- 

 round, with a large excavation from the posterior 

 margin on each side. The narrowed portion left 

 in the middle behind has a convex outline. Some 

 delicate radiating grooves occur on the exposed 

 surface, but they are very shallow. 



Measurements of Type. 



mm. 



Length of interclavicle 71.5 



Greatest width 78 



Width of lateral concavity 39 



Fig. 37. — So-called interclavicle of Eurythorax 

 sublcBvis Cope. (Sagenodus.) X0.75. (After 

 Cope.) 



• Dr. Hussakof now regards (Bull. Amer. Mus. Nat. Hist., vol. 35, p. 128, 1916) the type specimen of this species 

 as an opercular element of one of the dipnoan fishes [Sagenodus sublavis (Cope)]. The discussion is left here, however, 

 as a matter of historical interest. 



