VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 197 



Measurements No. 1. 



mm. 

 Length of carapace from posterior border to anterior suture of third 



vertebral scute ; 90 



Width of carapace at middle of third vertebral scute ; 134 



Diameters, third vertebral scute | anteroposterior ; 25 



transverse; 4 b 



Diameters, penultimate costal scute \ anteroposterior 



1 ( transverse; 



Diameters, of penultimate marginal scute < , * 



1 ° ( transverse 



Three ridges of costal bone ; 1 



tv , n -,,• • -, , ( anteroposterior border ; 10.5 



Diameters, or penultimate marginal scute < , L r 



\ transverse ; 8.5 



Length on median abdominal suture to ventro-femoral dermal suture ; 24.5 



" " " " to femoro-anal suture ; 28 



No. 3. 

 Thickness of hypoplastral at middle suture; 4.5 



ZAMENIS Wagler. 

 Zamenis acuminatus Cope. 



Represented by a fractured skull and twenty-five vertebrae from the anterior 

 part of the column. The vertebras display rather long r compressed, and obliquely 

 truncate hypapophyses as far as they are preserved ; and small protuberances project 

 from the inferior side of the anterior zygapophyses. The upper portion of the costal 

 articular face is the more convex ; the inferior the more longitudinal. 



Of the skull, the premaxillary, maxillary, prootic and mandibular bones are 

 preserved so as to be available for study. The first named is subconic, being 

 narrower and more protuberant than in Z. constrictor and Z. testaceus, with which 

 I have compared it. It formed an obtusely conical body, the lateral borders enclos- 

 ing less than a right angle. The maxillary has a distinct external margin on the 

 posterior half, which is interrupted by a long open excavation above the posterior 

 internal process. The anterior internal process is continuous with the superior 

 border. The maxillary foramen is large and is situated just anterior to the latter 

 process. The posterior internal process is truncate at the extremity. The two 

 processes and the space between them measure the bases of eight teeth. The latter 

 are subequal except on the anterior part of the bone, where they are a little 

 smaller. In the same space there are. nine teeth in a skull of Zamenis constrictor 

 with which I compare it. 



The mandible displays the characteristics of the genus. The pterygoid fossa 

 is deep and wide, and the lateral laminae well developed ; the inner lamina is not 



