No. 2, March, 1921] GENETICS 135 



of the mother head. A slight positive correlation (r = 0.17 ± 0.04) was found. — Seed was 

 preserved from these head-rows and was planted in similar rows the following year, and a 

 correlation coefficient determined for yields of rows and length of the original mother heads. 

 There was found to be no correlation in the second, third, fourth or fifth generations after 

 the selection of the original mother heads. — These results show that the length of the cen- 

 tral spike cannot be considered as an indicator of the relative yielding-ability of mother 

 plants. — A. N. Wilcox. 



901. Ibsen, Heman L. Tricolor inheritance. IV. The triple allelomorphic series in 

 guinea-pigs. Genetics 4: 597-606. Nov., 1919. — Presentation of data on 19 of the 21 possible 

 matings corroborating theory of triple allelomorphism of complete (E), partial (e*^), and no 

 (e) extension of black or chocolate pigment. Also data are given on litter size and sex ratio 

 for the various matings. Departures from the expected ratios are found and explanations 

 are suggested. — P. W. Whiting. 



902. Jordan, Edwin O. The differentiation of the paratyphoid enteritidis group. Jour. 

 Infectious Diseases 26: 427-434. May, 1920. — Article is based on the results of 6 years' obser- 

 vation. A culture, isolated from human blood, supposedly paratyphoid-B type, at first 

 gave typical cultural reactions (especially on sugars) and agglutination. Twelve colonies 

 regrown from the plating of the original culture displayed varying characteristics in the fer- 

 mentation of carbohydrates, end products, agglutination, and absorption of heterologous 

 immune serum; this is shown in several tables. Author concludes that substrains differing 

 from the parent strain are not only possible, but most frequent; this is proven both in vivo 

 et in vitro. — The limits of variability were not determined. — Andrew I. Dawson. 



903. Kalt, B. Der Begriff "Originalsaatgut" und seine Anwendung bei der Ziichtungs- 

 anerkennung. [The concept "Original seed" and its application in the recognition of breeding.) 

 Fiihlings Landwirtsch. Zeit. 1919: 460-471. 1919. — Much confusion is found concerning 

 conceptions of "Original seed." That seed which is first offered for sale as the product of a 

 well-planned system of breeding, and which is produced by the breeder or under his super- 

 vision is called "Original seed." Author emphasizes the need of organizations adopting 

 uniform rules and regulations for the inspection and certification of such seed. [See 

 also Bot. Absts. 7, Entry 619.]— C. M. Woodworth. 



904. Kniep, H. [German rev. of: Burger, Owen F. Sexuality in Cunninghamella. 

 Bot. Gaz. 68: 134-146. Aug., 1919. (See Bot. Absts. 3, Entry 2097.)] Zeitschr. Bot. 12: 

 518-520. 1920. 



905. Law, S. C. An albino bulbul. Avic. Mag. 11:111-112. July, 1920.— An albino 

 specimen of the black Indian bulbul was found in a nest with another youngster of the usual 

 color. According to the description and colored plate the albino was pure white and pink- 

 eyed. — Sai-ah VH. Jones. 



906. Lecaillon, A. Sur la reproduction et le developpement des bivoltins accidentels et 

 de la premiere generation qui en derive, chez le Bombyx du Miirier. [On the production and 

 development of accidental bivoltins and the first generation derived from them in the silkworm 

 (Bombyx mori).] Compt. Rend. Acad. Sci. 168: 366-368. 1919.— The author has shown 

 previously (Compt. Rend. 165: 603 et 683, 1917), that accidental bivoltin eggs appearing in 

 races of univoltins undergo a change of color from yellow to white, the embryos developing 

 within ten days in place of ten months. — To study the history of accidental bivoltins further, 

 the author selected five pairs of accidental bivoltin moths. These oviposited in the 

 summer of 1917, the eggs hatching in the spring of 1918, simultaneously with eggs of uni- 

 voltin parents oviposited two months earlier. — In the next generation, descendants differed 

 with different females. — In one case, bivoltins were produced, in a second case, although eggs 

 became white as with bivoltins, some eggs only hatched, eggs that failed to hatch becoming 

 rose-color (arrested development). In a third case some eggs were univoltin and some 



