376 PEOF. T. JEFFEET PAEKEE ON THE CEANIAL OSTEOLOGY, 



Hutton (9, p. loo) has brought forward evidence for considermg that this skull 

 should be associated with the leg-bones upon wliich the species crassus was 

 founded ; if this were the fact it would, according to the nomenclature I have 

 adopted, be placed in the genus IJmeus, which genus would then change places 

 with Pachyornis in my table of classification (p. 427). I learn, however, h\ 

 recent communication with Prof. Hutton that he is still somewhat uncertain upon 

 this point, and I think it will give rise to less confusion if I follow Owen and 

 Lydekker and assign the present skull to the leg-bones upon which the species 

 elephantopus was founded. 



2. Pachyoknis immanis, Lyd. 



Cast of a cranium in the Nat. Hist. Museum, numbered A. 201, and described by 

 Lydekker, Foss. Birds, p. 344. 1 doubt whether this specimen can be specifically 

 distinguished from elephantopus ^ 



This species is figured by Owen, as Dmornis elephantopus, Trans. Zool. Soc. 

 vol. vii. pi. X. (Ext. Birds of N. Z. pis. lix. & Ixxvi.). The best skull from Enfield 

 is figured from beneath on Plate LX. fig. 22. 



3. Pachyornis, species a. 



a. A cranium from Shag Point, differing from P. elephantopus in its greater breadth, 



especially across the postorbital processes, and in having the temporal and 

 lambdoidal ridges in contact. (Coll. A. Hamilton.) 



Figured in outline, Plate LXI. figs. 26 & 39, and Plate LXII. fig. 50. 



b. A skull with greatly damaged cranium, from a skeleton named Dinornis struthioides 



by Sir J. von Haast, is probably to be I'eferred here. (Canterbury Museum.) 



Both these skulls may belong to very muscular individuals of P. elephantopus ; 

 but 1 hardly think so, as in all the specimens undoubtedly referable to that species 

 the temporal and lambdoidal ridges are distinct. They may ultimately be found 

 to belong to I), rheides, the skull of which is not known. 



4. Pachyorxis, species /3. 



A single cranium from Glenmark, differing from P. elephantopus in being decidedly 

 narrower in proportion to its length. 



5. Pachyoknis, species y. 



A single cranium, from Enfield, differing from P. elephantopus in its much smaller 

 size, but agreeing with it in other respects. It is very possibly a mere variety, 

 but I have found no intermediate sizes. 



' In the 'Transactions of the New Zealand Institute,' vol. xxvi. (189.")), 1 have described a skull of 

 Pachyornis which ia about 10 per cent, larger in nearly aU dimensions than 1'. deplwHtopus., and have 

 referred it provisionally to P. immanis. — Tmie 1895. 



