l46 rAKTXAT.i:. 



Ballus eximius, Milne-Edwards '. 

 A species with a smaller and more slender hind limb than the preceding, and 

 approximating still more closely to Aramides. 

 Hah. Europe (France). 

 From the Lower Miocene of AUicr. 



Rallus intermedials, Milne-Edwards -. 

 An aberrant small species with a beak somewhat shorter than B. aqiiaticua, 



and diflering by the smaller size of the wing and the small and narrow 



sternum. 



Hab. Europe (France). ' 



From the Upper Eocene (Lower Oligocene) of Montmartre. 



Genus OCYDROMUS, Waglerl 

 As compared with the followiug extinct forms, the Hails of this 

 geuus arc comparatively small, without the power of flight. The 

 skull has the cranial box larger and narrower than in Aptornis, 

 with the temporal fossae less deep and the basioccipital not produced 

 downwards. The sternum is of moderate width, with the coracoidal 

 grooves extending nearly to the middle line. The tarso-metatarsus is 

 comparatively long, with several channels in the talon for the flexor 

 tendons. The terminal phalangeals of the pes are much curved. 

 The cervical vertebrae are comparatively long. 



©cutivomuiS emit, Gray *. 



The only species, now inhabiting the jS"orth Island of New Zealand. 



Some of the undermentioned specimens indicate a larger individual 

 than the single recent skeleton of 0. australis preserved in the 

 Museum, and may belong to a larger species. The occurrence of 

 this genus in the superficial deposits of New Zealand was first 

 indicated by Mantell in the ' Quart. Journ. Geol. Soc' vol. vi. p. 333 

 (1850). 



Eah. New Zealand (North Island). 



The foUowimj specimens ivere obtained froin superficial deposits at 

 Waingongoro, North Island, and were purchased from Walter 

 Mantell, Esq., about 1855. 



33125. The right humerus of a large individual, imperfect at the 

 extremities. 



' Oiseaux Fossiles de la France, vol. ii. p. 149 (1869-71). 



- Ibid. p. 144. 



3 Nat. Syst. Amph., Saug. u. Vogel, p. 98 (1830). 



' This, vol. iv. p. -238 (1862). 



