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



color; broken-colored bull to self-colored cow gave 179 broken color to 257 self color; and self 

 colored bulls and cows gave 425 self color to 75 broken color. Citations of the progeny of 

 certain bulls are given. — Mating white-tongue parents gave 71 per cent white-tongued. 

 Mating parents of white switch gave 91 per cent white switch. — The suggestion is made, 

 based on the fact that roan had disappeared from the Station herd, that the old roan Jersey 

 is due to a dominant factor. — John W. Gowen. 



211. HosKiNG, A. Hybrid Calceolarias, Card. Chron. 68:47, 61. 2 fig. July 24, 31, 

 1920. — A list of hybrid Calceolarias with brief descriptions and statement of parentage. — 

 J. Marion Shull. 



212. Jaramillo, p. J., and F. J. Chittenden. On double stocks. Jour. Roy. Hortic. 

 Soc. 44: 74^82. 2 pi. 1919. — Correlation shown between double flowering and vigor of 

 plant at time of pricking out, and confirming the observations of Miss Saunders to that 

 effect. — J. Marion Shull. 



213. Kathariner, L. Die Entwicklungsgeschichte der digenetischen Trematoden und 

 die Kontinuitat des Keimplasmas. [The ontogeny of the digenetic trematodes and the con- 

 tinuity of the germ-plasm.] Zool. Anzeig. 51 : 220-223. Aug., 1920. 



214. Kiessling, L. tJber eine Mutation in einer reinen Linie von Hordeum distichiim L, 

 [On a mutation in a pure line of Hordeum distichum L.] Zeitschr. indukt. Abstamm. Vererb. 

 19: 145-159. June, 1918. — In the ninth generation of a pure line of Hordeum distichum L. a 

 mutation occurred which is strikingly different from the parent form in many morphological 

 and physiological characters. In appearance the mutant is somewhat larger than the unmu- 

 tated plants and is lighter green in color, due to a reduction in chlorophyll. When the mutant 

 was crossed with the parent form, all differences were inherited as if due to a single point- 

 mutation. The author entertains the hypothesis that the mutation is concerned primarily 

 with a reduction in chlorophyll, and that the morphological variations are merely expressions 

 of the plant's readjustment to the decreased chlorophyll content. — W. H. Eyster. 



215. Kronacher, C. Die deutsche Schweinezucht und Haltung nach dem Kriege. 

 [German swine breeding and maintenance after the war.] Flugschr. Deutsch. Ges. Ziich- 

 tungskunde 41: 1-47. 1918. — The author emphasizes the importance to Germany of com- 

 plete independence from foreign countries in regard to food supply and the consequent 

 importance of raising the swine population to its prewar level. The problem is primarily 

 one of feeding rather than of breeding, and the first consideration is the basing of German 

 swine husbandry wholly on home-grown feeds. As regards breeding, most stress should 

 be placed on constitutional vigor, the extreme development of early maturity, and ease of 

 fattening having proved deleterious in this respect. — Sewall Wright. 



216. Kronacher, C. AUgemeine Tierzucht. Ein Lehr- und Handbuch fxir Studierende 

 und Ziichter. Vierte Abteilung (Abschnitt VI des Gesamtwerkes) : Die Ziichtung. [General 

 animal breeding. A text and handbook for students and breeders. 4th part (Section VI of the 

 complete work): Breeding. 8 vo. 357 p. Paul Parey: Berlin, 1919.— The first chapter, 210 

 pages, deals comprehensively with selection, including discussion of systems of mating, — 

 cross-breeding, pure-breeding, inbreeding, etc., — considerations in the judgment of pedigree, 

 performance, and conformation, discussion of fancy points, technical methods of judging, 

 special considerations in judging breeding stock, etc. — The second chapter, 137 pages, deals 

 with the physiology of reproduction in the domestic animals. — Sewall Wright. 



217. Leake, H. Martin. Report on the maintenance and improvement of the quality of 

 Egyptian cotton and the increase of its yield. Ministry Agriculture Egypt. Cairo. 38 p. 

 1920.— Author was invited by Egyptian Ministry of Agriculture to make "recommendations 

 with a view to the maintenance and improvement of the qualit}' of Egyptian cotton and the 

 increase of its yield." His report deals with such matters as relation of commercial supply 



