1882.] • -±59 [Cope. 



Scapular arch. M. 



Length of scapula on anterior face 069 



Width do. at antero-internal distal angle, transversely. .032 

 " of coracoid and epicoracoid at glenoid cavity, 



from edge of scapula 023 



Length of epicoracoid and coracoid 037 



" humerus 064 



Width of shaft at middle 016 



Diameters proximal end \ on ° 



c short at middle 010 



Diameters distal end { lon§ ° 39 



I short at middle 010 



Length ungual phalange 004 



second " 0075 



" first " 0135 



Width do. (P rosimall " V ° 10 



I distally 008 



This species was discovered by Mr. W. F. Cummins, to whom I dedi- 

 cate it with much pleasure. 



ANISODEXIS Cope, genus novum. 



Class Batrachia ; order Rhachitomi ; family Eryopidae. Teeth on pre- 

 maxillary, maxillary, and dentary bones of unequal lengths, some very 

 large, others very small. Dentinal inflections straight, nearly reaching 

 the pulp cavity. Cranial surfaces sculptured. 



This genus differs from all the others of the Eryopidce, in the great and 

 abrupt inequality of the teeth of the external series of the mouth, resem- 

 bling in this respect some of the Saurians of this deposit, rather than the 

 batrachia. Whether it possesses long palatine or pterygoid teeth such as 

 most of the latter exhibit, is not rendered clear by the specimens, but ap~ 

 pearances indicate the presence of one near the anterior part of the maxil" 

 lary. Mandibular series simple. 



Anisodexis imbricarius Cope, sp. nov. 



Founded on numerous fragments of the skull with jaws, and a verte- 

 bral arch and spine found in connection with the remains of the Diplocau - 

 pis magnicornis. These pieces indicate a larger species than the latter, 

 and are nearly equal to the Eryops megaceplialus. The jaws are not pre- 

 served entire, but portions from different parts of the length display 

 the dental characters. 



The sculpture of such parts of the superior surface of the skull is a coarse 

 reticulation, coarser than in any other species known to me. Near the 

 edges, some of the bones become smoother, and the ridges flatten into 

 overlapping laminse. The entire sculpture of the dentary bone is of this 

 imbricate character, the apparent overlapping being from before back- 



PROC. AMER. PHILOS. SOC. XX. 112. 3f. PRINTED NOVEMBER , 1882. 



