1881.] J-i^* 



front, and truncate behind. The posterior face has several longitudinal 

 wrinkles, including a median raised line, and there are some more ii'regu- 

 lar wrinkles on the sides. 



Measurements of vertebral. M. 



Anterior face of os dentatum f ^'^^^^^^ ^'^^ 



I depth (oblique) 013 



Posterior ftxce of os dentatum < ^^'" '^^ 



I depth 018 



Length os dentatum above 014 



c , . (. (depth 022 



\ posterior face , ' 

 Diameters axis < •- width 020 



^ length 0185 



Hypapophysial facet os dentatum | ^.^ , f^-, - 



length 022 



Diameters fourth cervical < „„.„_• . f depth 0225 



(. i width 022 



/length 0215 



Diameters sixth cervical } „ j,fgj.ioj^. / depth 0245 



( 1 width 0235 



Spaces between parapophysis and diapophysis of do 0040 



.length '. 02(i5 



Diameters of dorsal ) interior ^ ^^^1'^^^ *^"*^^ 



( ^ width 0265 



Height of neural spine of ?, from postzygapophysis 0210 



Anteroposterior width of do. at base 0100 



The portions of ribs are separated heads and shafts. The former are 

 double and therefore cervical, and are quite large. If the shafts belong to 

 them, the neck of this species must have been wide. The shafts are slender 

 and are of dense bone. The section is oval at the middle, but towards 

 the distal extremity becomes flattened and grooved and delicately line 

 ridged on one side. The extremities of the long bones are without con- 

 dyles but have concave surfaces like those of the ribs. The bodies are ro- 

 bust and angular. They may be abdominal ribs of unusual stoutness. 

 From the Puerco beds, D. Baldwin. 



Stated Ifeeting, Jamiary 6, 1882. 



Present, 8 members. 



President Fraley in the Chair. 



Letters of acknowledgment were received from the Anthro- 

 pological Institute of Great Britain and Ireland (XV, 3 ; 107, 

 108) ; and the Linnean Society, London (105, lOH). 



