Measurement of ribs. 59 



The first gives d mm. at the lower end and the breadth above 

 this point is uniform the second 9 mm. uniform, 'd^^ 9 mm. at the end 

 and 11 mm. a little higher up. 4*^ 6 mm. as compared with 13 mm. 

 higher up. 5'^ 7 mm. to 16, 0"" 8 mm. and 17 above the lower end. 



The llyaciia. Behind the 6"> the middle thirds are broader tangen- 

 tially than the inferior thirds which are rounded and compressed except 

 at the lower ends which are broader. 



Ursus Arctos. 



480 mm. Dorsal. 

 Breadth at Breadth 



j^'Dg 11 . g^j^j extremth. at angles. 



First rib. 



120 



mm. 



23 



30 r 







2"«! 



150 



» 



15 



23 r 







3rd 



200 



» 



14 



20 r 







4 th 







17 



20 r 







5th 







17 



20 r 







6th 



340 



n 



17 



17 







7th 

 8th 



370 



39r> 



n 

 n 



18 

 20 



17 



20 



broadest. 



Distance of 

 broadest 



9th 



415 



n 



19 



20 



20 



part from end, 



lOtb 



415 



» 



17 



16 



18 (r) 



150 mm. 



11th 



395 



n 



14 



16 



15 (t) 



200 „ 



I'Jth 



350 



n 



14 



16 



16 



180 „ 



13"» 



305 



n 



16 



14 







14th 



260 



n 



18 



14 







The radial diameters behind and the tangential diameters in front 

 are the most considerable as is very well known. 



The second rib is of nearly uniform tangential breadth as far as 

 the eight. 



The 3"» and 4*'' ribs increase in breadth at first and then diminish, 

 when traced upwards. 



The O"' maintains its diameter for 4 cm. and then diminishes. 

 The sixth has a uniform breadth for some distance from the lower end. 



The seventh experiences a very gradual decrease in diameter for 

 the lower fourth then the breadth is the same up to tlie middle and 

 then the breadth increases gradually in the upper half. 



in the ^i"' the decrease in the breadth of the rib is more rapid 



