160 MR. W. P. PTCEAFT ON THE MORPHOLOGY AND 



Wray [97] ; the figure illustrating his paper has been reproduced here by the kind 

 permission of the Zoological Society. The pterylosis of the trunk of the embryo has 

 been figured by Lindsay [48], and is reproduced here (fig. 3a). 



Apteria : — 



Apt. spinale. — Very narrow, longer relatively than in Casuarius, which it resembles. 



Apt. mesogastrcei, — According to Hildebrand [37] this extends from the beak to the 

 cloaca, but judging from Miss Lindsay's [48] figures it did not extend beyond the 

 sternal callosity, as in other flightless Palceognathce- 



Apt. trunci laterale. — This would appear in size and form to closely resemble that 

 of Apteryx, and to differ from all the remaining PalmognatluB. 



Hildebrand also describes an apterion on the crown of the head. 



Pterylce : — 



Ft. alaris (PI. XLV. fig. 11). — According to Wray [97] there are 16 metacarpo- 

 digitals, distributed as follows : — metacarpals 8 ; addigital 1 ; mid-digitals 4 ; pre- 

 digitals 3. 



According to Wray's figure, reproduced on PL XLV. fig. 11, the primaries are 

 placed wide apart and almost at right angles to the long axis of the hand. The 

 number of the metacarpals is higher than in any other bird — 8. In Bhea and some 

 Neognatlue, i. e. Flamingo, there are 7 metacarpals. In no other bird, save Struthlo, 

 are there 4 mid-digitals and 3 pre-digitals. The arrangement of the coverts appears 

 to differ materially from that of Ehea. The ala spuria is made up of 4 remiges. 

 I await a spirit-specimen before attempting the search for the carpal remex and 

 its covert. 



It would be interesting to know whether the^cror carpi ulnaris resembled that of 

 Bhea in the large fleshy portion for the attachment of the remiges (fig. 5 a, p. 240) 

 and what is the condition of the vinculum tendinese. Assuming that the disposition of 

 these parts in Rhea represents a proto-carinate condition, we should expect to find the 

 wing of Struthio very similar in these particulars. 



Both poUex and index are armed with a claw. 



Mhamphotheca. — Compound as in Bhea 



Podotheca. — Acropodium and lower portion of acrotarsium with broad transverse 

 scutes. Only 3rd and 4th toes are present ; of these in the adult only the 3rd bears 

 a claw. 



Uropygiutn wanting. 



