274 PROFESSOR OWEN ON THE GENUS DINORNIS. 



Fig. 2. Distal trochlea of ditto. 



3. Tibia of Dinornis didiformis. 



4. Distal trochlea of ditto. 



5. Tibia of Dinornis otidiformis. 



6. Distal trochlea of ditto. 



PLATE XXVI. 



Back views of tibiae, natural size. 



Fig. 1 . Tibia of Dinornis ingens. 



2. Proximal end of ditto. 



3. Tibia of Dinornis didiformis. 



4. Proximal end of ditto. 



5. Tibia of Dinornis otidiformis. 



6. Proximal end of ditto. 



The following letters indicate the corresponding parts in each figure : — 



a. Concavity anterior to the articular condyles. 



b. Process for the attachment of the rotular ligament. 



c. Anterior crista at the proximal end. 



d. Ridge for the attachment of the fibula. 



e. Internal condyle or prominence of the distal trochlea. 



PLATE XXVII. 



Tarso-metatarsal bones, natural size'. 

 Fig. 1 . Front view of the tarso-metatarsal of Dinornis giganteus. 



2. Front view of the tarso-metatarsal of Dinornis struthoides. 



3. Front view of the tarso-metatarsal of a female (?) Dinornis didiformis. 



4. Back view of ditto. 



5. Upper or proximal end of ditto : a, the outer concavity ; b, the inner one. 



6. Lower or distal end of ditto. 



PLATE XXVIII. 

 Tarso-jnetatarsal bones, half the natural size. 



Fig. 1. Front view of the metatarsus of a young Ostrich (Struthio Camelus). 



2. Proximal ends of the three metatarsal bones, which are still separate at this 



part. 



3. Front view of the metatarsus of a young Dinornis giganteus. 



' The mirror was not used in drawing these bones ; they appear, therefore, to belong to the right leg. 



