Neue Litteratur. 51 



Delage, Y. 1909. Les vraies causes de la pretendue Parthenoge- 

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 Sehiffner, V. 1909. Ueber die Grenzen der Descendenzlehre und 



Systematik. (Verh. k. k. zool. bot. Ges. Wien. LIX. 7/8. p. 345—364.) 

 Seliber, G. 1909. Les variations dans le regne vegetal et les con- 



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gen. Bot. XXI. 251. p. 420-445. ä suivre.) 

 Shull, G. H. 1909. Bursa bursa-pastoris and Bursa Heegeri: Bioty- 



pes and Hybrids. (Washington 1909. 8°. 57 pp. 4 pl. 23 fig.) 

 Sollas, I. B. J. 1909. Inheritance of colour and of supernume- 



rary mammae in Guinea-Pigs, with a Note on the occurrence 



of a dwarf Form. (Rep. Evolution Comm., Royal Society. V. 



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 Spillmann, W. J. 1909. Application of some of the Principles of 



Heredity to Plant Breeding. (Bull. Bur. of Plant Ind. U. S. Dept. 



Agric. (Washington, D. C). 1909. 165. 74 pp. 6 fig.) [A general 



discussion of the breeding of plants and animals from the Men- 



delian Standpoint. — W. T. Swingle].) 

 Thomas, R. H. 1909. Partenogenesis in Nicotiana. (Mendel Journ. 



1909. 1. p. 5-10.) 

 Trabut, L. 1909. Sur quelques faits relatifs ä l'hybridation des 



Citrus et ä l'origine de l'oranger doux (Citrus aurantium). (C. R. 



Ac. Sc. Paris. CIL. 24. p. 1142-1144.) 

 Wheeler, W. M. 1909. Predarwinian and postdarwinian Biology. 



(Pop. Sc. Monthly. LXXIII. p. 381—5.) 

 Wheldale, M. 1909. Further observations upon the inheritance of 



flower colour in Antirrhinum majus. (Rept. Evol. Comm. roy. Soc. 



V. p. 1-26.) 

 Wheldale, M. 1909. Notes on the physiological Interpretation of the 



mendelian factors for colour in plants. (Rept. Evol. Comm. roy. 



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 Wheldale, M. 1909. On the nature of anthocyanin. (Proc. Cam- 

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 Witt, O. N. 1909. Odontoglossum tripudians X Pescatorei Charles- 



worthii. (Gartenflora. 1909. 3. Beilage Orchis.) 

 Winkler, H. 1909. Ueber die Nachkommenschaft der Solanum- 



Propfbastarde und die Chromosenzahlen ihrer Keimzellen. (Zschr. 



f. Bot. IL 1. p. 1—38.) 

 Wittmaek, L. 1909. Studien über die Stammpflanze der Kartoffel. 



(Ber. deutsch, bot. Ges. XXVII. 1. Gen. Vers. Heft. p. (28)— (42). 



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 Woodruffe-Peaeock, E. A. 1909. Heredity of acquired characters. 



(journ. of Bot. XL VII. 564. p. 446.) 

 Wulff, E. 1909. Ueber Pollensterilität bei Potentilla [Schluss]. (Oes- 



terr. bot. Zschr. LIX. 11. p. 415—424.) 



TL Physiologie. 



Blackman, F. F. 1909. Vegetation and frost. (N. Phytologist. VIII. 



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 Ciamician, G. e C. Ravenna. 1909. Sulla formazione dei glucoside 



per mezzo delle piante. (Atti r. Acc. Lincei Roma. XVIII. 12. 



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 Deleano, H. T. 1910. Recherches chimiques sur la germination. 



(Arch. Sc. biolog. XV. 1. p. 1—24.) 



