216 



PACHYORNIS PONDEROSUS ( hutt.) 



Euryapteryx ponderosus Hutton, Trans. N.Z. Inst., p. 137 (1892). 



THIS species is slightly smaller than P. elephantopus, the tarso-metatarsus 

 varying from 8*25 to 8'0 inches, as opposed to from 9*4 to 9-25 in 

 elephantopus ; the tibio-tarsus varies from 18-5 to 18*6, as opposed to 

 24 to 21-1 ; femur, 10, as opposed to 13 to 11 8. 



The skull can be distinguished by the processes at the hinder angles 

 of the basi-sphenoid, which are higher and rounder in ponderosus, flatter 

 and more elongated in elephantopus. Type : Hamilton. 

 Habitat : Middle Island, New Zealand. 



Cast of egg in Tring Museum, taken from specimen in Otago Museum, 

 dredged up in 1901 in the Molyneux River, also incomplete skeleton from 

 Kapua Swamps. 



PACHYORNIS INHABILIS hutt. 



Pachyomis inhabilis Hutton, Trans. N.Z. Inst. XXV, p. 11 (1893). 



DIFFERS from ponderosus by having the great inward expansion at the 

 distal end of the tibio-tarsus. This expansion has induced some 

 ornithologists to separate the species of Pachyomis into two genera — 

 Euryapteryx and Pachyomis — but I do not think this expansion of sufficient 

 importance to warrant generic separation. 



Habitat : Middle Island, New Zealand. 



PACHYORNIS VALGUS ( hutt.) 



Euryapteryx valgus Hutton, Trans. N.Z. Inst. XXV, p. 12 (1893). 



THIS species is at once distinguishable from all others by the extraordinary 

 internal expansion of the distal end of the tibio-tarsus. The tarso- 

 metatarsus is 8-5 inches = 216 mm. in length and the proximal width 

 3-5 inches = 89 mm., and does not differ much from crassus except in the 

 great proximal width, necessary to articulate with the distal internal 

 expansion described above. 



The type came from Enfield in New Zealand. 

 Habitat : Middle Island, New Zealand. 



