CORYPHODON. 527 



tibial face is concave transversely, convex anteroposteriorly at the front, 

 and plane behind. There is a posterior submarginal foramen, which is 

 not bridged over in one specimen, producing a deep notch. The navicular 

 facet has considerable transverse extent, and the anterior side of the bone 

 is more transverse than in B. radians. The calcaneal facets are diagonally 

 02Dposite to each other; the outer is subround, the inner anterior narrow 

 and transverse. It differs in the two specimens, the perfoi'ating foramen 

 not being bridged over in the one (the type) with the similar posterior 

 interruption described above. This may be due to fracture. The only 

 ungual phalange has the articular face not quite sessile on the transverse 



rugose free extremity. 



Measurements. 



M. 



Diameter of diapopliysis atlas (fore and aft) 0. 036 



Diameter of axial facet of atlas 034 



( fore ami aft ' 040 



Diameter of cciitrum of dorsal < vertical (total) 043 



' transverse 059 



Diameter of neural arcli of same < „.„ 



( transverse 0j2 



I anteroposterior 041 



Diameter of centrum of lumbar< vertical (total) 050 



V transverse 063 



Diameter of head of femur 060 



Length of astragalus fore and aft 050 



Width of astragalus 065 



Length of navicular facet 049 



Width of navicular facet 020 



W idth of cuboid facet 018 



Length of cuboid facet 016 



Width (fore aud aft) of anterior Calcaneal facet 018 



Length of posterior calcaneal facet 022 



Length of fibular facet (axial) 041 



Length of terminal phalange 012 



Width of terminal i)halange, proximally 015 



Width distally .030 



transverse 054 



anteroposterior 080 



Diameter of glenoid cavity of scapula ; 



The specimens procured by myself were taken from the bone bed on 

 October 5 and 6, 1873. Those taken on the former day are of a ferrugi- 

 nous color, and include right scapula, ulna and radius, sacrum, right ilium, 

 and left femur. Those obtained oJi the following day are of a black color, 

 and include left humerus, left tibia without distal extremity, patella, and 

 right femur. With each lot is a cervical vertebra, but I am not sure 



