22 Transactions. 



Dinornis casuarinus, Owen. 



When classifying tlie large material at my command, I found tliat the 

 leg hones belonging to this species were of three distinct sizes, and that 

 a transition never occurred between them. 



Although the bones of each subdivision showed small and unimportant 

 differences when compared one with the other, they have, nevertheless, a very 

 close reseuiblance in every other respect. 



After having placed together all the bones bearing the same general 



character, I found that we possessed portions of at least forty -five specimens, 



arranged in the three subdivisions following, namely : — 



No. 1, largest size, 15 specimens. 



No. 2, middle size, 16 specimens. 



No. 3, smallest size, 14 specimens. 



It may be here observed that this number represents only a portion of 

 the specimens buried in the swamp, as many of the bones were either lost, 

 broken into fragments, or they were altogether inaccessible, so that without 

 doubt many odd leg bones were matched together, being exactly of the same 

 size and character, although they belonged origina,lly to different individuals". 



No. 1. Din. casuarinus. — Largest size. 



On examining the tarsus-metatarsus of this subdivision, I found that it 

 corresponded best with one figured by Professor Owen as crassus, (Plate 48, 

 p. 324, Vol. III., "Trans. Zool. Society,") although the measurements of 

 crassus given by Professor Owen further on in his excellent memoirs, differ 

 slightly from the specimen in question, and, as it appears to me, from his 

 own figured metatarsus. 



Length of Girtli of 



bone. proximal end. 



Tarsus metatarsus 8"8 in. 9'2 in. 



Tibia 18-7 „ 14-9 „ 



Femur U'O „ 12-4 „ 



It will be seen that, when compared with Professor Owen's monographs, 

 the metatarsus of this subdivision or variety is a httle larger, the tibia 

 exactly of the same size, and the femur a little larger than his casuarinus. 



Grirth of shaft, 



Girth of 



thinnest part. 



distal end. 



5-1 in. 



10-8 in. 



4-8 „ 



10-5 „ 



5-6 „ 



130 „ 



No. 2. Bin. casuarinus, Owen.- 



—Middle size. 





Length of 



Girth of 



Girth of shaft, 



Girth of 



bone. 



proximal end. 



thinnest part. 



distal end 



Tarsus metatarsus 8-4 in. 



8-8 in. 



4 "5 in. 



10-3 in. 



Tibia 18-5 „ 



12-7 „ 



4-4 „ 



101 „ 



Pemur 10-8 „ 



iri< . 



5-5 „ 



12-6 „ 



