23 



Diameter of surface of attrition of a tootli of the raiddle row, 

 longitudinal 0063 



Diameter of surface of attrition of a tootli of the middle row, 



transverse 0072 



Width of maxillary bone 0350 



Depth of maxillary at inner margin 0140 



What I suppose to be the posterior end of the maxillary bone exhibits 

 the grooves to near its apex, as well as a considerable surface of articu- 

 lation for the malar. 



Two dorsal vertebrae are preserved, whose neural arches are co- ossified, 

 with trace of suture remaining. Both articular faces exhibit a trans- 

 verse fossa for ligamentous or bursar}^ attachment. Eound these, on the 

 convex face, there are transverse rugosities, while oblique-ridged lines 

 descend on each side from the floor of the neural canal. The centra are 

 shorter than deep, and subquadrate in a horizontal section. The sides 

 are concave; the anterior are compressed with lenticular vertical section 

 with angle below. The more posterior is less compressed, and the sur- 

 face is smooth ; in the anterior it is thrown into weak longitudinal ridges 

 near the edges of the articular extremities. There are large nutritious 

 foramina on the sides. The neurapophyses are excavated vertically on 

 their posterior edges. ^Neural arch on the anterior dorsal, a broad, verti- 

 cal oval. A caudal vertebra is rather elongate and depressed; as it has 

 no diapophysis it is not from the anterior part of the series. There is 

 no prominent lateral angle, but the two inferior angles connecting the 

 che^Ton facets are well marked. Keurapophysis only measuring hall 

 the length of the centrum. The articular faces exhibit the same trans- 

 verse fossa as is seen in the dorsals. The anterior is plane, the posterior 

 uniformly concave. 



Measurements. 



M. 



Anterior dorsal, length of centrum 074 



Anterior elevation of articular face 073 



Anterior width of articular face 070 



Anterior vertical diameter of neural canal 027 



Anterior elevation of anterior zygapophyses 122 



Middle dorsal, length of centrum. '. 068 



Middle elevation of articular face 085 



Middle width of articular face 080 



Middle caudal, length of centrum 062 



Middle elevation of articular face, (at canal) 047 



Middle width of articular face ,. 068 



Middle width between inferior angles 024 



Middle width of neural canal 013 



The, femur is onlyrepresentedby the distal end with the condyles per- 

 fectly preserved. The latter form a single trochlear surface, whose 

 borders form arcs of circles. It is slightly hour-glass shaped, chiefly 

 by excavation of the posterior face, which is, however, shallow, the deep 

 fossae seen in Hadrosaurus and other genera being absent. The area 

 of the articular cartilage is clearly marked out, and the dense surface of 

 the shaft is marked with delicate strife which terminate at the edge of 

 the former. One side of the end of the bone is nearly plane, the other 

 is longitudinally excavated ; some shallow grooves furrow the angle 

 with the trochlear face. The section of the shaft, three inches from the 



