| OCR Text |
Show 1874.] ANATOMY OF THE PARROTS. 591 In Cacatua galerita and C. leadbeateri it is present; but it is generally wanting in C. 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, Palaornis, Eclectus, Prioniturus, Eolophus, Psittinus, Eos, Tanygnathus, Licmetis, Trichoglossus. 2. Parrots in which there are two normally situated carotids, no ambiens muscle, no furcula, and an oil-gland-namely Agapornis, Geopsittacus, Euphema, 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, Pceocephalus, Ca'ica, 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, Psittacula. The true significance of these facts next requires attention ; and the principle upon which all attempts at the formation of a satisfactory genealogy or classification of the suborder can be arrived at must |
