williston: vertebrate remains. 3 



middle below. Inferior surface gently carinate, and with small 

 venous foramina. Sides rather deeply concave. Anterior zygapo- 

 physes approximated, concave, facing each other, and united below, 

 forming a sort of "spout." Articular surfaces transverse, elliptical 

 in outline, rather deeply concave, with a rounded eminence in the 

 middle of the concavity, the rim above gently emarginated for the 

 neural canal. The neural arch shows no trace of suture. Its mea- 

 surements are as follows: 



Length of centrum 62 mm. 



Width of parapophysis at base 30 " 



Transverse diameter of articulating surface 83 " 



Vertical diameter of same 55 " 



Width of neural canal 20 " 



Height of lower margin of anterior zygapophyses 



above floor of neural canal 25 " 



Distance between anterior zygapophyses 20 " 



Another, fairly well preserved caudal vertebra seems to belong to 

 the same species. It has the articular faces deeply cupped in the 

 middle, but with a broad, convex rim. On the under, longitudinally 

 concave surface, there are three, feebly- marked ridges, with two 

 venous foramina between them. The neural arches are united by 

 sutures, and are slightly misplaced. The anterior zygapophyses are 

 remote from each, other and are inclined inwards at an angle of 

 about 45 degrees. The following are its measurements: 



Length of centrum below 35 mm. 



Length between rims, same place 25 " 



Transverse diameter of articulating surfaces 47 " 



Vertical diameter of same 45 " 



Depth of cups 10 " 



Another, larger, caudal vertebra, less well preserved, presents the 

 same characters as the foregoing, but has the transverse diameter of 

 the articulating surfaces (75 mm.) proportionally a little greater than 

 the vertical (65 mm.). 



A phalangeal bone has its articulating surfaces quite flat, measuring 

 40 mm. in the transverse, 30 in the vertical diameter. The bone has 

 the shape of a flattened cylinder, with a gentle constriction, and 

 measures 40 mm. in length. 



A humerus, the shape of which is sufficiently well shown in the 

 figure, has its lateral distal margins quite thin, and shows no facets 

 for the fore-arm bones. It has a total length of about no mm. with 

 a thickness in the middle of the distal end of 20 mm. and of the 

 shaft above, 35 mm. 



CROCODILIA. 



A single vertebra (fig. 5), wanting the neural arch, but otherwise well 

 preserved, I refer somewhat doubtfully to Hyposaiirus or a closely 



