No. 4, January, 1921] GENETICS 257 



1747. Roffo, A. H. Sur le role du facteur race dans la transmission du cancer chez le rat. 

 Transformation progressive d'une race non receptive. [On the role of the race factor in the 

 transmission of cancer in the rat. Progressive transformation of a non-receptive race into a 

 receptive one.] Compt. Rend. Soc. Biol. 83:968 970. 1920. Two races of while rats differ 

 in reaction to implants of various tumors which originated in one of them (A). Tumors 

 were of different histological types. Race A showed growths in 95 100 per cent implanted; 

 Race 15 in 5 per cent; Fi hybrids between these races, |."> per cent; third generation hybrids, 

 60 per cent. Tumor grown in Race B gave 30 per cent positive. After') month-; serial inocu- 

 lation gave 80 per cent. Cross between albino and wild (Mus decumanus) gave albinos in F|. 

 In next generation albinos, black and white, and black. Evidence for difference in suscepti- 

 bility correlated with color, was found in small numbers of animals. Tumor from hybrid gen- 

 eration introduced into 10 wild black rats grew slowly in one. After seven passages it grew 

 in 70 per cent (numbers not given). Tumor had then attained virulence and rate of growth 

 equal to control albinos. — C. C. Little. 



1748. Rosenheim, Otto. Observations on Anthocyanins. I. The anthocyanins of the 

 young leaves of the grape vine. Biochem. Jour. 14: 178-188. Fig. 1. 1920. 



1749. Saunders, E. R. Heredity. Sci. Monthly 1: 436^45. 1920.— Extracts from 

 an address at the Cardiff Meeting of the British A. A. S— History of attempts to analyze 

 heredity begins with Galton and Pearson. — The effect of results due to two or more 

 factors are suspected when ratios run high.— We can not infer from the genetic analysis of 

 one type that the factorial relations are the same for the corresponding character in 

 another. No sharp line of distinction can be drawn between the behavior of varietal and 

 specific features. — L. Pace. 



1750. Schiemann, E. [German rev. of : White, O. E. Inheritance studies in Pisum. I. 

 Amer. Nat. 50:530-547. 1916. Idem. II. The present state of knowledge of heredity and 

 variation in peas. Proc. Amer. Phil. Soc. 56:487-588. 1917; Idem. III. The inheritance 

 of height in peas. Mem. Torrey Bot. Club 17: 316-322. June 10, 1918; [See Bot. Absts. 1, 

 Entry 250.] Idem. IV. Interrelation of the genetic factors of Pisum. Jour. Agric. Res. 11: 

 167-190. 1917.] Zeitschr. indukt. Asbtamm. Vererb. 24:98-101. Aug., 1920. 



1751. Schleip. [German rev. of: Herbst, K. Beitrage zur Entwicklungsphysiologie der 

 Farbung und Zeichnung der Tiere. 1. Der Einfluss gelber, weisser und schwarzer TJmgebung 

 auf die Zeichnung von Salamandra maculosa. (Contribution to the physiology of development 

 of the color and color-pattern animals. 1. The influence of yellow and black surroundings 

 on the color pattern of Salamandra maculosa.) Abhandl. Heidelberger Akad. Wiss. Math.- 

 Naturwiss. 1919.] Zeitschr. indukt. Abstamm. Vererb; 24: 101-103. Aug., 1920. 



1752. Schubart, P. Blutauffrischung in der Zuckerriibensamenzucht. [Freshening the 

 blood in sugar-beet breeding.] Zeitschr. Pflanzenziicht. 6: 209-215. Dec, 1918. 



1753. Schultz, Walter. Bemerkung zur Arbeit von Knud Sand iiber experimentellen 

 Hermaphroditismus. [Comment on the work of Knud Sand on experimental hermaphroditism.] 

 Pfli'igers Arch. f. d. ges. Physiol. 179: 217-218. 1920. 



1754. Scott, Will. A sex intergrade pig, which resembles a free-martin. Anat. Rec. 

 17:323. Jan., 1920.— Author's abstract of paper read before American Society of Zoolo- 

 gists, St. Louis, December 30, 1919.— This pig is full term and has the external genitalia of a 

 female. In addition, a scrotum is developed. Internally a vagina and uterus are formed, but 

 the gonad has migrated and degenerated. The position of the ducts has been modified correl- 

 ative to that of the gonad. — Will Scott. 



1755. Siemens, Hermann Werner. Uber einige immer wiederkehrende Missverstand- 

 nisse der Entwicklungslehre. [On several always-recurring misunderstandings in genetics.] 

 Med. Klin. 16: 12-16. 1920. 



