W. LlLLJEBORG, 



Of the 11 th pair of ribs, we posses only a little more than the lower 

 half of the right rib, and this fragment serves to show that this pair had 

 much the same form as the 10 th . 



The 12 th pair of ribs (PL VII. fig. 56, the right) is pretty much 

 like the 10 th but shorter. Immediately below the upper obtuse point it 

 has an outer, an inner, and an anterior longitudinal ridge, and behind a 

 little lower down a bump, and lower down on the posterior border a 

 deep notch. 



The 13 th pair of ribs (PL VII. fig. 57, the right) has the upper end 

 immediately under the extremity compressed, with an outer and inner tole- 

 rably sharp ridge. About the lower end it is moreover something broader 

 than the last pair. 



The 14 th pair of ribs (PL VII. fig. 58, the right) is much less and 

 slighter but not much shorter, than the last. The upper end is much com- 

 pressed in the transverse direction, and the hinder border is uneven. 



The 15th pair of ribs (PL VII. fig. 59, the left) is both less and 

 shorter, especially the latter, than the 14 th . It has an undulating curvature, 

 and the upper extremity is not compressed, but thick, knobformed and oval. 



Dimensions of the ribs: 

 Length along the outer convex edge of the 2 nd left rib, exclusive of capitular 



process 5'. 



d:o d:o from capitulum of the 4 th left 7' 7". 



d:o d:o d:o d:o 5 th d:o 8'. 



d:o d:o d:o d:o 6* d:o 8' 1}". 



d:o d:o from extremity of capitular process of 7* left ... 7' 5-p. 



d:o d:o from the uppermost point d:o 8* d:o . . . 7' 0|". 



d:o d:o d:o do d:o 9* do ... 6' 7|". 



Length measured along the outer convex edge of the 10* right rib . 5' 10^-". 



d:o d:o d:o d:o 12* d:o . . 5' 



4 



d:o d:o d:o d:o 13* d:o . . 5'. 



d:o d:o d:o d:o 14* d:o . . 4' 8|". 



d:o d:o d:o d:o 15* left . . 4' 



Breadth of 2 nd right rib at broadest part, at lower end .... 4|". 



d:o d:o d:o d:o upper 4±'\ 



d:o 3* left d:o d:o lower 4-5." 



d:o 4* d:o d:o d:0 . . . . 4A" 



d:o d:o d:o d:o upper 5-L". 



d:o 14 th right d:o d:o lower 21". 



d:o 15 th left d:o d:o d:o 2±". 



