130 GENETICS [BoT. Absts., Vol. VII, 



and on small-fruited forms, as M. floribunda, M. Sargentii, M. Toringo, M. atrosanguinea, 

 Fi seedlings resemble small-fruited parent in tree characters, though sometimes in an invig- 

 orated form. Some groups of Fi seedlings in no way resemble parents in vegetative char- 

 acters. — C. H. Connors. 



873. Crow, J. W. Plant breeding from horticultural standpoints. Ontario Dept. Agric. 

 Ann. Rept. Agric. and Exp. Union 41 : 50-52. 1919. — Plant breeding work in the Department 

 of Horticulture of the Ontario Agricultural College is briefly outlined, and the need of further 

 work is emphasized. — A. N. Wilcox. 



874. Crow, J. W. Vegetable seed growing and breeding. Amer. Soc. Hort. Sci. 1918: 

 88-93. 1918. — The experience in growing and breeding vegetable seeds at the Ontario Agri- 

 cultural College, and methods used there in growing and curing celery, carrot, parsnip, beet, 

 and onion seeds are briefly outlined. — A. N. Wilcox. 



875. Dalcq, Albert. Note sur la spermatogenese de I'Drvet. [Note on the spermato- 

 genesis of the orvet.] Compt. Rend. Soc. Biol. 83: 1302-1304. Oct., 1920. 



876. Daniel, Lucien. Sur la stabilite et I'heredite des Crataegomespilus et des Pirocy- 

 donia. [On the stability and heredity of Crataegomespilus and of Pirocydonia.] Compt. 

 Rend. Acad. Sci. Paris 169: 513-515. 1919. — Daniel has grown 6 forms of chimera, or sup- 

 posed chimera, none of which bore viable seeds. — (1) The two hawthorn-medlar chimeras of 

 Bronvaux have been grown for over twenty years, and showed no reversions for about fifteen 

 years. — (a) The form most like the medlar has borne twigs of hawthorn, of both chimeras, and 

 twigs resembling medlar. These last, regrafted, gave chimeras again. — (b) The forms most 

 like hawthorn has produced few twigs of hawthorn or of other forms. — (2) The two hawthorn- 

 medlar chimeras of Saujon have been grown for about ten years. — (a) The form nearest 

 the medlar produced some twigs resembling the medlar, but no twigs with spines. — (b) The 

 form nearest the hawthorn bore some twigs of hawthorn, which, however, still showed some 

 characteristics of the chimera. — (3) A pear-quince chimera has been grown for 7 years. It 

 arose from the callus of a graft, is intermediate in its leaves, and can be grafted on either 

 pear or quince. It has formed no flower-buds. — John Belling. 



877. Daniel, Lucien. Obtention d'une race nouvelle d'Asphodele par Paction du climat 

 marin. [The appearance of a new variety of Asphodelus through the action of the marine 

 climate.] Compt. Rend. Acad. Sci. Paris 170: 1332-1333. 1920. 



878. Doncaster, L. Genetic studies in Drosophila. [Rev. of: Morgan, T. H., C. B. 

 Bridges, and A. H. Sturtevant. Contributions to the genetics of Drosophila melanogaster. 



V + 388 p., 12 p. Carnegie Inst. Washington, Publ. No. 278. Washington, 1919.] Nature 

 105:405-406. 1920. 



879. Doncaster, L. Mendelism. [Rev. of: Punnett, R. C. Mendelism. Sth ed. 

 IS X 19 cm., XV + 219 p., 7 pi., 52 jig. Macmillan and Co.: London, 1919.] Nature 104: 

 655-656. 1920. — "One of the best introductory treatises on the modern study of genetics. 

 We note with regret that the hypothesis of multiple allelomorphs is nowhere fully discussed." 

 [See Bot. Abst. 6, Entry 714.]— O. A. Stevens. 



880. Duarte d'Oliveira, Jose. Sur la transmission de la fasciation et de la dichotomic 

 a la suite de la greffe de deux vignes portugaises. [The transmission of fasciation and dichoto- 

 mous branching through the grafting of two Portuguese varieties of grapes.] Compt. Rend. 

 Acad. Sci. Paris 170: 615-616. 1920. — Scions of a Portuguese variety of grapes, Albino de 

 Sauza, were grafted on stock of another variety, Goncalo Pires. The latter varietj'' is char- 

 acterized by dichotomous branching and the frequent production of fasciated branches. The 

 former never exhibits these peculiarities. The grafts were made in March. The following 

 June the author noted that the new growth from the scion showed the fasciations and dicho- 

 tomous branching characteristic of the variety used as the stock and has since continued to 

 exhibit these characteristics. — C. B. Hutchinson. 



