Cope.] 14: [April 17, 



tosis presented by the neural arch and its parts, and in some degree by 

 the centrum. The outline of the latter viewed from below is barrel -shaped, 

 and the space between the inferior surface of the centrum and the extrem- 

 ity of the diapophysis is filled with osseous tissue, so as to be bounded by 

 a nearly straight line connecting the points in question. The diapophyses, 

 where not continued into ribs, are somewhat flattened cones. Tbe neura- 

 pophyses are greatly thickened, having more than twice the transverse 

 diameter of the small neural canal. The zygapophyses are mere ledges ; 

 the prezygapophyses of the neurapophyses ; the postzygapophyses of the 

 neural roof. The latter is expanded and thickened, an anterior thickening 

 on each side, constituting the zygosphen. The neural spine is moderately 

 a little elevated, and is compressed ; its base extending the length of the 

 neural arch. The prezygapophyses are opposite the middle of the neural 

 canal. The postzygapophyses are connected by a thin prolongation ot 

 the roof of the neural canal, which is not interrupted in any of the ver- 

 tebras at my disposal. 



The anterior caudal vertebra is flattened below, and has a median shal- 

 low fossa. A large basis for a rib marks the upper part of the anterior 

 half of the centrum, and below it is a low tuberosity. Between the latter, 

 on the ? intercentral half, is a short accuminate tubercle directed forwards. 

 The posterior articular face is supplemented by two facets below, as if for 

 separate chevron bones. 



A more posterior caudal vertebra has a longer, and compressed centrum, 

 without transverse processes or tubercles. The inferior surface has a ridge 

 on each side, which are interrupted by the constriction already mentioned. 

 Those of the posterior half are continued into coossified chevron bones. 

 The postzygapophyses are more elevated on the dorsal vertebras, and the 

 neural spine is robust and is directed strongly backwards. 



The surfaces of the dorsal vertebrae are smooth ; that of the anterior 

 caudal is minutely punctate, and at some points wrinkled. 



Measurements of Vertebra. 



No. 1 (with rib). M. 



Total elevation 0125 



Elevation of centrum anteriorly 0040 



" to prezygapophysis 0055 



" " zygosphen 0070 



" " highest base of neural spine 0090 



Width of centrum anteriorly 0035 



" " prezygapophyses 0090 



No. 2 (without ribs). 



Total elevation 0160 



Length of centrum 0080 



Elevation to neural canal posteriorly 0038 



" "postzygapophyses 0058 



" " neural spine 0100 



