O. G. Dely szerk.: Vertebrata Hungarica 8/1-2. (Budapest, 1966)

Horváth, L.: Adatok a palearktikus madarak leszármazásának ismeretéhez néhány magyarországi fajon végzett aberrációs vizsgálatok alapján 111-118. o.

Date to the Knowledge of the Evolution of Palaearctic Birds on the Basis of Aberration Studies on Some Hungarian Species By L Horváth Zoological Deportment of the Hungarian Natural History Museum, Budapest Insofar as a great percent of specimens show aberrations, this circumstance evinces a high rate of laxity of the features. The very looseness of the traits, on the other hand, implies that the irregularities are atavistic in character and cannot be relegated to the other aberrations in color. Following the origin and evaluation of the atavistic features, one can establish that the species in question descends, together with the one or more species to which it reverts, from a common ancestor or eventually ancestors. This latter surmise Is corroborated by the fact that a number of abei'rational specimens display atavistic features common with two species already distinct today. Irodalom - References 1. BANNERMANN, D. A.: The Birds of the British Isles (London, 1-12, 1953-1962). - 2. HORVÁTH,L.

: The Evolutionary Significance of the Aberrations Occur ing in the Plumage of the Bullfinch Pyrrhula pyrrhula L. (Acta Zool. Hung., 6, I960, p.

341-347). - 3. HORVÁTH, L

.î The Phylogenetic Significance of the Brown Moustachial Stripe of the Yellow Bunting Emberiza citrinella L. (Ann. Hist.-nat. Mus. Nat. Hung.,

52,