494 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 38. 



divisions of the alveoli form distinct sockets for the teeth and fur- 

 nish additional evidence of the mature age of this individual. 



The coronoid is missing. 



The articular is somewhat damaged but the parts remaining show 

 no unusual characters. 



Comparative measurements of rami. 



Length of ramus 



Breadth of ramus through center of alveolus of fourth tooth 



Seighi nl symphysis in line with alveolus of fourl h tooth 



Length of symphysis 



Length of splenial contribution to symphysis 



Length of postsymphysial foramen 



Heighl of postsymphysial foramen 



Height of splenial behind postsymphysial foramen 



Bread! h of dentary al alveolus for eighth tooth 



Heighth of dentary in line with same alveolus 



Heighth of ramus at posterior end of external mandibular foramen 



Thickness Of angular a little above lower border where last measurement was 

 taken. 



Thickness of surangular at upper border where last measurement was taken. 

 Length occupied by alveoli from fourth to eighteenth tooth 



Holotype Holotype 



of Leiayo- of Lenyo- 



suchus suehus 



sternbergii. canadi nsis. 



mm. 



380 



31 



19 



56 



7.5 



6 



3 

 16 

 11 

 is 

 53 



16 



7 



123 



in in 

 a 335 

 .'il 

 18 

 o 57 

 11.5 

 7.5 

 3. 2 

 16 

 18 



17.5 

 53 



16 



s. 5 

 128 



a Estimated. 



Vertebrae. — Of the vertebral column of this specimen there are pre- 

 served the left neurapophysis of the atlas, four dorsal, two lumbar, 

 and one sacral (second) vertebrae. All of those present are of the 

 procoelian type. 



The neurapophysis, when compared with the homologous part in 

 Crocodilus americanus, shows the anterior process to be a little longer 

 and wider vertically, and the constriction above the articular end 

 forming a somewhat deeper notch on the forward side. 



The dorsals show the typical cup and hall articulation. The centra 

 have the sides concave antero-posteriorly, with the least transverse 

 diameter toward tin 1 posterior end. Tn all of the dorsals preserved 

 the inferior surface is evenly rounded. In this respect they differ 

 from those of Leidi/osuclnis <<ntadensis, which are described as being 

 ll.tt in this aspect. The centra increase in breadth below the neuro- 

 central suture. The neural arches inclose the neural canal which is 

 slightly higher than wide. The arches of these vertebrae are firmly 

 COOSsified with the centra, which furnishes additional evidence of the 

 mature age of the individual. Two of the dorsal centra show shallow 

 longitudinal depressions on the mid-lateral surfaces. None of the 

 spinous processes are complete though the broken bases show them 

 to have been broad antero-posteriorly. The transverse processes are 

 given off well up on I he sides of t he arches. The most anterior dorsal, 



