1885.] 1^ [Cope. 



Measurements of Vertebra. M. 



Elevation neural spine from canal 054 



Length diapophysis below 038 



Width at postzygapophyses 030 



(anteroposterior 045 

 vertical (front) 037 

 transverse (front) 035 



Length diapophysis below 033 



Width at postzygaphyses 023 



Length of base neural spine above postzygapophyses. . . .030 



The coracoid bone has an expanded proximal extremity, which contracts 

 on the external side abruptly, into a slender shaft which continues to the 

 distal end, which is but little expanded. The coracoid foramen is well 

 within the external border, and is small. The distal end is flattened below, 

 and has a convex margin. The shaft has an oval section. This element 

 is much more slender than in the Alligator mississippiensis, and even more 

 so than in the Teleosaurus eadomensis, according to Deslongchamps. 



Measurements of Coracoid. M. 



Total length 165 



Long diameter of proximal end 065 



Thickness of proximal end at glenoid facet 023 



Diameter of shaft \ vertical °J° 



c transverse 015 



Width of distal end 0295 



The humerus is rather elongate, and is but little curved. The head is 

 directed a little inwards and forwards, and the condyles (which are lost) 

 a little backwards. The section of the shaft is nearly round from below 

 the deltoid crest to near the condyles. The head is flattened and its artic- 

 ular extremity is convex and narrow. Near the internal border of the 

 anterior side is a shallow fossa. The deltoid crest is elongate, and lies on 

 the external edge of the posterior face. Its elevation increases distal, 

 i. e., to a point nearly two-fifths the length from the head. 



Measurements of Humerus. M. 



Length of part preserved 220 



Diameters of head 5 anteroposterior 019 



C transverse 051 



Diameters shaft 3 cm. below crest {anteroposterior... .025 



». transverse 027 



General Remarks. — The characters of this species are much like those 

 of H. rodgersi, so far as they are known. I observe the following differ- 

 ences on comparison with several individuals of that species. The artic- 

 ular faces of the vertebral centra, are less concave than in the Northern 

 species. The symphyseal part of the mandible is a part of a cylinder in 

 the H. rodgersi, while it is flattened below and at the sides in the Brazilian 



