No. 2, November, 1920] GENETICS 91 



662. Bateson, W., and Caroline 1'i.u.i w. The genetics of "rogues" among culinary 

 peas (Pisum sativum). Proc. Roy. Soc. London 91: 186 L95. May 12, 1920. — Summarizes 

 data on genetics of "rogues" in peas published in l'.U 1. Gives details of further experimen 

 Finds: (1) reciprocal crosses between type and rogue give plants which, as they develop, 

 turn into rogues. (2) Though characters of type are introduced and manifest their pres- 

 ence by affecting form of young l'i plant, they very rarely take part in germ-lineage, being 

 apparently left behind in the lower nodes. (;> l'i >nts really intermediate between type and 

 rogue exist, but never breed even approximately true. Their germ-cells may be either type, 

 intermediate (2 kinds at least), or rogue. Proportion of gametes carrying type-characters is 

 different on male and female sides, the ratio in both sexes showing gradational change. — 

 Egg-cells of lower flowers, up to about 10th flowering node in more than 50 per cenl of eases 

 carry type-characters — at least the non-pointed character — above which level, proportion 

 declines. Only about 20 per cent of pollen in lowest two flowers is type-bearing, and above 

 this level, in each successive flower, the proportion of type-bearing pollen rapidly diminishes. 

 Discusses somewhat comparable cases of Biff en with gray chaff character in wheat crosses; 

 of Ikeno with variegated Capsicum crossed with green type, with no recovery of former in 

 later generations; of B Aim's interpretation of data obtained from crosses between white- 

 skinned and green plants, and of Winge's observations on Humitlus, where slightly variegated 

 lower leaves, subsequently became green. Of all these, Winge's case is said to be the most 

 comparable. Weak growth on type plants in peas does not specially favor appearance of rogue 

 characters, and rogues even when most luxuriant, do not produce types. No Mendelian sys- 

 tem applicable in such cases, but genetic differences in germ plasm undoubtedly exist. No 

 clear discontinuity. Two sorts of intermediate gametes must exist — one more type-like and 

 one more rogue-like. Numerical chromosome differences between rogue and type do not exist, 

 each having seven in haploid cells. Comments on long-held belief of practical breeders 

 and conventional evolutionists that when selection ceases, a breed degenerates. As regards 

 rogue character in peas, this is true, although not true for any other known genetically stud- 

 ied case, so far as the writers know. — Orland E. White. 



653. Bauer, J. Aufgaben und Methoden der Konstitutionsforschung. [Problems and 

 methods of study of the constitution.] Wiener klin. Wochenschr. 1919. 



654. Baur, E. Einfiihrung in die experimentelle Vererbungslehre. [Introduction to gen- 

 etics.] 3rd & 4th ed., 410 p., 10 colored pi., 142 fig. Gebruder Borntn'iger: Berlin, 1919. 



655. Bergman, Emanuel. A family with hereditary (genotypical) tremor. Hereditas 1: 

 98-106. 2 fig. 1920. 



656. Camek, Josef. Investigations of the hair of different breeds of cattle. Jour. Agric. 

 Sci. 10: 12-21. Jan., 1920. — Investigations of hair of different European breeds of cattle 

 showed that in pure-bred animals maximum length of hair is found between the ages of 6 

 months and 2 years, and that older animals have shorter hair. The hair of bulls is always 

 longer than that of cows and oxen of the same age. The white hair of an animal is shorter 

 than the colored. The diameter of the hairs is less for cattle up to 3 months and the greatest 

 diameter is reached by animals between 1 and 2 years of age. Males have hair of greater 

 diameter than do females. The white hair of an animal is of less diameter than colored. In 

 general, diameter increases with length. In short hair the diameter is relatively greater than 

 in long ones. With bulls the ratio of diameter to length is smaller than in cows and heifers 

 of the same age. The ratio is greater in white hair. Food is without influence on diameter. 

 — Ash content of hair depends on pigmentation, age, sex, and possibly food. Colored hair 

 contains more ash than white and also more iron. Ash is also greater in black than in brown 

 or red hair. — Elmer Roberts. 



657. Chodat, R. La panachure et les chimeres dans le genre Funkia. [Variegation and 

 chimeras in the genus Funkia.] Compt. Rend. Soc. Phys. Hist. Nat. Geneve 36: 81-84. 1919. 



