34 GENETICS [Box. Absts., Vol. VII, 



223. Mac-Auliffe, A. Marie et Leon. Influence du milieu parisien sur la race. 

 [Influence of Parisian environment on the race.] Compt. Rend. Acad. Sci. 171 : 527-529. 

 Sept., 1920. 



224. MiLEwsKi, A. W. tJber Torniers experimentelle Untersuchungen, iiber das Ent- 

 stehen pathologischer Verbildungen bei Tieren, sowie weiteres iiber experimentelles Erzielen 

 von monstrosen Goldfischarten, [On Tornier's investigations on the origin of pathological 

 malformations in animals as well as further consideration of the experimental attaining of 

 monstrous goldfish species.] Arch. Entwicklungsmech. Org. 44: 472-498. 1918. 



225. MiLLiKBN, C. S. Some facts about citrus bud selection. California Citrograph 

 5:222. May, 1920. — A popular article emphasizing "bud selection" as essential for the 

 most profitable production of citrus fruits. — Howard B. Frost. 



226. Nachtsheim, Hans. Crossing-over-Theorie oder Reduplikations-hypothese? [The 

 crossing-over theory or the reduplication hypothesis?] Zeitschr. indukt. Abstamm. Vererb. 

 22: 127-141. 4 fig. Jan., 1920. — A critical review of Trow's modification of the Bateson- 

 PuNNETT hypothesis of reduplication as an explanation of coupling and repulsion (linkage) 

 (Trow, A. H., Jour. Genetics 5: 1916). Although the more recent papers were not available 

 to the author, it is concluded that the crossing-over hypothesis, as worked out in the studies 

 on Drosophila, offers a better explanation of the phenomena. — H. H. Plough. 



227. Namyslowski, B. Etat actuel des recherches sur les phenomenes de la sexualite 

 des Mucorinees. [The state of researches on sextiality in the Mucorineae.] Rev. G4n. Bot. 

 32:193-215. 9 fig. 1920. 



228. Ness, H. [misprinted as N. Hess]. Experiences in plant hybridization. Proc. Amer. 

 Soc. Hortic. Sci. 16:52-60. (1919) 1920.— Author calls attention to fact that much which 

 has been written concerning plant hybridization has been largely repetition of phenomena 

 in stock examples. — Importance of plant hybridization was early appreciated by floricul- 

 turists, and from them we have many forms of begonia, canna, gladioli, etc. Their work 

 resulted from an attempt to supply a demand and few records have been kept; thus the 

 scientific value of the work has been greatly lessened.— The uncertainty of positive results 

 makes hybridization work by the individual a somewhat uncertain financial proposition, 

 and thus is best done by a publicly supported institution.— Author has worked with two 

 genera, Rubus and Quercus, that with Rubus being an Adams Fund project. Has made 

 many crosses among which were May's dewberry (R. villosus) also called Austin, by the Early 

 Harvest blackberry (R. argutus). In the first generation the May's was almost completely 

 dominant, and a good population was obtained. From the reciprocal crosses he failed to 

 obtain any progeny, neither was he successful when Early Harvest was the mother and 

 the pollen was secured from other sources. In these experiments several attempts were 

 made with crosses of difi"erent varieties and species of Rubus but without success until he 

 used seedlings of the raspberry, R. rubisetus, as the maternal parent; and the influence of this 

 parent was manifest in subsequent generations. He notes: "The most remarkable part of 

 these phenomena appears to me to be that fertility appeared only in the most robust group of 

 those of the Fz generation in which the raspberry was dominant; and that having once 

 occurred, it became invariably hereditary just as though sterility was merely a passing 

 crisis."— His work with Quercus shows that "the various individuals of a species vary widely 

 in their affinity for foreign pollen To be successful in hybridization it is neces- 

 sary to search out by trial individuals having the proper afiinity for the pollen to be applied. 

 For this purpose seedlings would naturally be preferred to plants produced vegetatively."— 

 C. E. Myers. 



229. Onslow, H. The inheritance of wing colour in Lepidoptera. III. Melanism in 

 Boarmia consortaria (var. consobrinaria, BKH.). Jour. Genetics 9:339-346. 1 pi. Mar., 

 1920.— Melanism of consobrinaria, crossed with the grayish speckled type, is dominant. In 



