406 PROCEEDINGS OF THE ACADEMY OP 



surrounding portions, which rises in a fine hounding ridge round 

 the surface formerly capped by the cartilage. The articular end 

 of a bone may be the proximal end of the femur. The section of 

 the shaft resembles that of a T-rail the lesser expansion repre- 

 senting the base of the trochanter, and the greater that of the 

 head. Seen proximally, the head is transverse and truncate, as 

 in the great trochanter of many mammals, while the trochanter is 

 smaller, oval in section, and oblique to the head. There are two 

 articular facets on the head the larger extends across the inner 

 side ; the smaller is subround, and is directed inwards or towards 

 the trochanter ; the two are separated by the ridge of a right 

 angle. 



A supposed distal end of a metapodial bone displays a shallow 

 trochlear face of not much antero-posterior diameter. A phalange 

 is of remarkable form, resembling that of an herbivorous dinosaur 

 in its short wide proportions. The articular faces are slightly 

 trochlear in their character, and the inferior is directed inferiorly 

 at an angle of 45 to the axis of the shaft. The form indicates a 

 diaitiorade terrestrial form. The proximal end of a rib exhibits 

 the section of the shaft and the head. The latter has a broad, 

 tubercular, articular surface, and a smaller capitular surface on 

 the narrow produced head. The section of the shaft is lenticular. 



This genus appears to combine some dinosaurian characteristics 

 with those in which it resembles the Rhynclioceplialia. This 

 association of diverse features is confirmed by those observed in 

 the genus Clepsy drops, Cope, described below. 



Specific Characters. The surface of the sides of the centrum 

 is marked with a few coarse shallow longitudinal grooves, which 

 run into shallow reticulations of weak raised lines. The neura- 

 pophysis is sharp-edged in front, and with some ridges externally 

 at the base. 



The edge of the posterior articular face is excavated opposite 

 to the chevron facets. The latter are large, are separated by a 

 flat surface, and are bordered external^ by a raised edge from the 

 polished dense layer of the lateral face. 



M. 



Diameter of centrum vertical 021 



" " transverse . 



" " longitudinal 



Width of neural canal . 

 " of neurapophysis 



.019 

 .011 

 .006 

 .004 



