Page 588. 
248 
Conurus pavua. 
peta. 
xvantholemus. 
Ooracopsis barklyi. 
' Cyanorhamphus auriceps. 
nove-zealandic. 
Eclectus polychlorus. 
Holophus roseicapillus. 
Hos cardinalis. 
—- indica. 
riciniata. 
Euphema aurantia. 
bourkit. 
— pulchella. 
splendida. 
Geopsittacus occidentalis. 
Lathamus discolor. 
Licmetis pastinator. 
Loriculus asiaticus. 
chrysonotus. 
galgulus. 
Lorius lort. 
tricolor. 
Melopsittacus undulatus. 
Nestor meridionalis. 
ON THE ANATOMY OF THE PARROTS. 
Nestor notabilis. 
Paleornis alexandri. 
erythrogenys. 
longicauda. 
torquata. 
Pionus menstruus. 
sordidus. 
Platycercus eximius. 
pallidiceps. 
zonartus. 
Peocephalus fuscicapillus. 
senegalensis. 
Prioniturus, sp. 
Psephotus hematogaster. 
pulcherrimus. 
Psittacus erithacus. 
Psittacula passerina. 
Psittinus malaccensis. 
Pyrrhulopsis splendens. 
Pyrrhura leucotis. 
vittata. 
Stringops habroptilus. 
— Tanygnathus muelleri. 
Trichoglossus concinnus. 
novee-hollandice. 
The points to which my attention has been directed, on account of 
the variations observed, are :— 
1. The arrangement of the carotid arteries ; 
2. The presence or absence of the ambiens muscle ; 
3. The presence or absence of the furcula; 
4, The presence or absence of the oil-gland ; 
and others of minor importance, such as the complete encirclement of 
the orbit by bone, and the peculiarities of the atlas vertebra. These 
will be considered separately. 
I. The arrangement of the carotid arteries among the Parrots. 
In my paper on the carotid arteries of birds, the peculiarities of 
these vessels in the Parrots are described, it being shown that three 
different arrangements of these vessels obtain, and perhaps a fourth. 
Hither the two carotids may run normally, independent, and side by 
side up the front of the neck, in the hypapophysial canal ; or the right, 
as usual, traverses that canal, whilst the left rans superficially along 
