27H RATIT^. 



but exhibits its relative small size. The sternum ii5 

 entire, and shows the three intercostals joining the ribs. 

 The pelvis exhibits the broader form (as compared with 

 Megalapieryx hectori), and the descent of the lateral 

 margins of the postacetabular part of the ilia below the 

 level of the anterior postacetabular sacral ribs. The small 

 size of the hallux is well shown '. 



Beceived in exchange from Sir J. von Haast, K.C.M.O. 



b. The Tarso-metatarsus. 



18595. Cast of the left tarso-metatarsus. The original, which is 

 the type, was obtained from Poverty Bay, North Island, 

 and is preserved in the Museum of the Royal College of 

 Surgeons. It is described and figured by Owen in the 

 ' Trans. Zool. Soc' vol. iii. pp. 241, 242, pi. xxvii. figs. 3-6, 

 and also in his ' Extinct Birds of New Zealand,' pp. 79-80, 

 pi. xxvii. figs. 1-6 ; all the figures being reversed. The 

 length of the specimen is 0,173 (6"8 inches), and the width 

 across the distal condjles 0,083 (3*25 inches). 



Presented by the Gouncil of the Moi/al 

 College of Surgeons, 1844. 



32048*. A slightly imperfect right tarso-metatarsus, closely resem- 

 bliug the preceding specimen ; from Waikouaitu, South 

 Island. Walter Mantell Collection. Farchased, about 1855. 



21707. The left tarso-metatarsus ; from Te Eangatapu, North 

 Island. This specimen is slightly larger than the type, 

 but has the same contour, and may be safely referred to 

 the same species. Mantell Collection. Purchased, 1838. 



21784. A nearly similar right tarso-metatarsus ; from Te Eangatapu. 



Mantell Collection. 



21707 a. The right tarso-metatarsus ; from Te Eangatapu. This 

 specimen is almost indistinguishable from the type. 



Mantell Collection. 



21706*. A slightly imperfect smaller left tarso-metatarsus, probably 

 referable to this or one of the allied species. It is longer 

 and more slender than the corresponding bone of A. (?) 

 neranoides. Mantell Collection. 



' In tbs 'Ibis,' ser. 3, vol. iv. p. :il2 (1)574), it is iucorrectly stated that this 

 species had no hallux. 



