730 Recently published Ornithological Works. [Ibis, 



may be remarked tbat notliing whatever is known 

 about the sternum of Archceojiteryx. 

 6. " The separation of the birds into the Carinate and 

 Ratite groups had already begun in Jurassic times/' 



In one point Professor Petronievics' nomenclature cannot 

 be adopted. The London specimen was described by Owen 

 under the name jirchcBopteryx macrura. This is objected to 

 by Petronievics on the ground that the trivial name macrura 

 applies equally to ArcJieeojiteryx and Archceornis, both pos- 

 sessing long tails. He therefore suggests the name Archce- 

 opteryx oiveni for the London specimen, an entirely in- 

 admissible alteration. 



Sachtleben on Lithuanian Birds. 



[Beitrage zur Natuv- uud Kiiltiu-gesc-hichte Litliauens unci augren- 

 zeiider Gebiete, von E. Stecliow. Vogel von Dr. H. Sachtleben. 

 Abhandl. Bay. Akad. Wiss. Miinclien, Siippl.-Bd. 1 Abli. 1922, pp. 9- 

 232, 1 pi. J 



This is an elaborate and intensive study of the birds of 

 Lithuania, based primarily on the collections of Dr. E. 

 Stechovv, made in the Grodno Government in 1918. This, 

 together with other smaller collections, gave Dr. Sachtleben 

 936 skins representing 116 forms to work on. Each species 

 is dealt with at considerable length, and the plumage- 

 development, plumage- changes, individual variation, and 

 geographical variations are considered in detail. This is 

 especially the case with the Nuthatches Sitta e. europcea and 

 S. e. homeyeri, to the discussion of which twenty-five pages 

 and a coloured plate are devoted. In this he shows very 

 clearly the gradual change from the Italian bird with the 

 richly coloured underparts to the Swedish one with the 

 almost white underparts. 



Dr. Sachtleben has not attempted a complete account of 

 the birds of Lithuania, as this task is being undertaken by 

 Count Zedlitz in a series of papers in the course of 

 publication in the Journal fiir Ornithologie, 



