580 



MOA 



tibia (fig. 1, B) and tarso-metatarsus (fig. 2, B), and also by the 

 broad and flattened beak, the apparent absence of the hallux, and 

 the width and convexity of the sternum. The typical D. novaz- 



zeolandias (including D. giganteus 

 and D.ingens J ) is mainly confined 

 to the North Island, and is one 

 of the largest species, the length 

 of the tibia of the presumed 

 female being 35 inches. In the 

 South Island this Moa was re- 

 presented by the closely -allied 

 D. maximus (D. robustus, in part), 

 which is the largest of all the 

 species, having a tibia measuring 

 39 inches, and probably reaching 

 a height of 12 feet. D. gracilis 

 (fig. 1, B) and D. struthioides 

 (fig. 2, B) were considerably 

 smaller forms, occurring in both 

 islands, and referred by Hutton 

 to a distinct subgenus (Tylo- 



Fig. 2. RIGHT TARSO-METATARSUS of Pachyornis pteryX). 



elephantopus (A), and Dinornis struthioides MegCtlaptenjX, Yon Haast, 



worko' Anterioraspect ' < F mthesame originally referred to the Aptery- 



gidse, is represented by two much 



smaller and imperfectly -known forms from the South Island, 

 characterized by the extreme slenderness and length of the femur 

 and tibia (fig. 1, C), and the shorter tarso-metatarsus. 



Anomalopteryx, Reichenbach ( = Meionornis, Haast) is typically 

 represented by the small D. didiformis, Owen, and, in our opinion, 

 may be conveniently taken to include all the smaller species of the 

 group, although Capt. Hutton prefers to separate Owen's D. dro- 

 mseoides as Palapteryx, D. curtus as Cela, and D. didinus as Mesopteryx. 

 On the other hand, Owen's D. casuarinus, which Yon Haast 

 included in Meionornis, is placed by Capt. Hutton with Emeus crassus. 

 Whether included under one or more generic headings, all these 

 forms are characterized by having the tibia and tarso-metatarsus 

 considerably shorter and stouter than in Dinornis, while the beak is 

 narrow and more or less pointed, the hallux present (as in the 

 following genera), and the sternum (fig. 3, A) very long and 

 narrow. There is great difficulty in correctly identifying the 

 various members of this group with the species named by Owen 

 on the evidence of detached bones. A. casuarina, with a tibia 

 measuring 19 inches in length, is the largest form, and A. (Cela) 



1 If these forms be regarded as distinct, the name novae-zealandise, should be 

 adopted for the latter. 



