Page 591. 
252 ON THE ANATOMY OF THE PARROTS. 
In Cacatua galerita and C. leadbeateri it is present; but it is 
generally wanting in OC. cristata, and has not been found in C. sul- 
phurea. 
The above facts may be tabulated in a form which makes their 
significance more readily apparent, by placing those together in which 
a similar arrangement is observable. Thus there are :— 
1. Parrots in which there are two normally situated carotids, no 
ambiens muscle, a furcula, and an oil-gland—namely : 
Aprosmictus, Loriculus, 
Calopsitta, Lorius, 
Calyptorhynchus, Paleornis, 
Eclectus, Prioniturus, 
Holophus, Psittinus, - 
Eos, Tanygnathus, 
Liemetis, Trichoglossus. 
2. Parrots in which there are two normally situated carotids, no 
ambiens muscle, no furcula, and an oil-gland—namely 
Agapornis, Geopsittacus, 
EHuphema, Melopsittacus. 
3. Parrots with a left carotid only, no ambiens muscle, a furcula, 
and generally an oil-gland—namely ; 
Cacatua. 
4. Parrots with two carotids (the left being superficial), an ambiens 
muscle, a furcula, and an oil-gland—namely 
Ara, Nestor, 
Bolborhynchus, Paocephalus, 
Caica, Psittacus. 
Conurus, 
5. Parrots with two carotids (the left being superficial), no ambiens 
muscle, a furcula, and an oil-gland—namely 
Coracopsis, Pyrrhulopsis, 
Lathamus, Pyrrhura. 
6. Parrots with two carotids (the left being superficial), no ambiens 
muscle, a furcula, and no oil-gland—namely 
Brotogerys, Pionus. 
Chrysotis, 
7. Parrots with two carotids (the left being superficial), no ambiens 
muscle, no furcula, and an oil-gland—namely 
Cyanorhamphus, Psephotus, 
Platycercus, Psitiacula. 
