14 



manner in which the fossils of this formation have been dislo- 

 cated and scattered. The evidence for the existence of this 

 species must be allowed to rest at present on a cervical vertebra, 

 with free hypapophysis. This body differs from the corresponding 

 one in the G. annectens in its greater brevity as compared with 

 its length. The vertical and transverse diameters exceed the 

 longitudinal in the G. brevicollis, while in the G. annectens the 

 length exceeds both. The inferior aspect of this centrum is 

 broadly rounded, not carinate as in C. annectens. The value of 

 this character is uncertain, but a centrum similarly rounded be- 

 low (above alluded to) has the more elongate form of the C. an- 

 nectens. 



Measurements. m. 



Santero-posterior 013 

 vertical 014 

 transverse 015 



Champsosaurus vaccinsulensis, sp. nov. 



This reptile is indicated by a posterior dorsal vertebra in which 

 the common base of the neural arch and diapophysis is decurved 

 to below the middle of the side of the centrum. This surface has 

 somewhat the outline of the section of a T-rail, the inner portion 

 being on the superior face of the centrum. The centrum is shorter 

 than the corresponding ones of the G. annectens and C. profundus, 

 so that the basis of the neural arch approaches near the borders of 

 the articular faces above. The centrum is perforated by two ver- 

 tical foramina as in most ^.uroipterygia. The osseous tissue of the 

 bone is quite dense, and the surface is smooth. 



Measurements. m. 



r anteroposterior . . . . .026 



Diameter of centrum < vertical . . . . . . .029 



'transverse . 045 



Besides the much larger size, this species differs from those 

 previously referred to this genus in almost all details of propor- 

 tion, etc. 



SCAPHERPETON, Cope. 



Genus novum Batrachiarum. Vertebrae deeply biconcave, 

 with opposed, but not continuous, foramina for the chorda dor- 

 salis. Neural arch with zygapophyses, and well-developed neural 

 spine. Centrum with vertically compressed, short diapophysis 



