44 



R. J. Anderson, 





1 



2 



o 



4 i 6 



6 



7 



8 



9 



10 



11 



12 



13 



A 

 B 



C 

 D 



24 

 15 

 3 

 5 



35 

 15 

 2,5 

 4,5 



50 

 20 

 2,5 

 4 



60 

 20 

 2 

 4 



70 



27 

 2 

 5 



73 

 30 

 3 

 4 



70 

 35 

 3 

 4 



72 

 50 

 3 

 3,5 



70 



2,5 

 3 



68 



2,5 

 3 



60 



3 



2 



50 



3 



2 



25 



2,5 

 2 



The greatest breadths are tangential except the first and reach inwards and 

 outwards from the angles. 



The letters have the same meaning as in the last. 



In Galago the ribs are also wide behind but less so in proportion 

 to the breadths of the lower ends than in the last mentioned. 



The sloth (Bradypus tridactylus). 



The three toed sloth, Bradypus tridactylus, has the anterior two or 

 three cartilages or sternal ribs united to the vertebral ribs (ribs proper). 

 The breadths which are greatest in the tangential direction are given 

 in the subjoined table and the radial breadths which are small are 

 not given. These breadths will be represented by 2 — 3 mm. 



10 



11 



12 



13 



14 14 



40 



7 

 5 

 5 

 30 



50 



4 

 4 

 5 

 40 



60 



65 



80 



95 



6 



10 



13 



20 



4 



6 



6 



6 



5 



7 



7 



8 



5 



7 



. 7 



7 



50 



50 



nO 



60 



100 

 30 

 6 



7 

 7 

 60 



100 



45 

 7 

 8 

 8 

 80 



100 

 60 



5 



8 



9 

 80 



100 

 35 

 4 



80 



96 



3 



7 

 8 

 70 



90 



2,5 

 7 

 8 

 70 



86 



70 



77 



3 



6,5 



5 



60 



60 



2,5 

 7 



5 



50 



A = Length of rib from tubercle to anterior end (in first rib the length of rib and 

 the lengtli of de cartilage which is ossified). 

 Tlie other letters are the same as in Lemur. 



