ON THE ANATOMY OF THE PARROTS. 247 
39. ON SOME POINTS IN THE ANATOMY OF THE 
PARROTS WHICH BEAR ON THE CLASSIFICA- 
TION OF THE SUBORDER.* 
(Plates VI & VIL.) 
Iy a former communicationt, a review of certain of the most variable Page 586. 
characters found amongst the Columbe enabled me to give hints with 
regard to the mutual relationships of the different genera of that con- 
siderable family, which I hope will be found of service. On the 
present occasion it is my desire to follow out a similar method, taking 
the Psittaci, a suborder quite as, and perhaps even more, difficult to 
by external features only. 
The unequalled collection of living Parrots in the Society’s Gardens, Page 587. 
and the liberality of friends, have placed at my disposal specimens ' 
of the large number of 82 species, in all of which I have been able to 
note the characters laid stress on in this paper. To save repetition a 
list is here given of the species examined by me; and on all future 
occasions when a genus only is mentioned, it refers to those species of 
it which are contained in this list. 
Names of Species examined. 
Agapornis roseicapilla. Caica melanocephala. 
Aprosmictus erythropterus. - Calopsitia nove-hollandie. 
scapulatus. Calyptorhynchus banksit. 
Ara ambigua. Chrysotis agilis. 
ararauna. collaria. 
—— macao. : —— festiva. 
maracanda. — levaillantit. 
Bolborhynchus monachus. ochrocephala. 
Brotogerys tiriacula. ; Conurus eruginosus. 
—— tovi. aureus. 
-—— pyrrhopterus. —— aztec. 
virescens. —— hematorrhous. 
Cacatua cristata. —— holochlorus. 
—— galerita. —— jendaya. 
—— leadbeateri. —— monachus. 
—— sulphurea. —— nanday. 
* “ Proceedings of the Zoological Society,” 1874, pp. 586-98. Pls. LXX and 
t “Proceedings of the Zoological Society,” 1874, p. 249. (Supra, p. 229.) 
