No. 1, July, 1920] GENETICS 129 



798. Uda, Hajimh. On the relations between blood color and cocoon color In silkworms, 

 with special reference to Mendel's law of heredity. Genetics 4: 395 - 1 1 « > . Sept., 1919. — New 

 race of silkworm with yellow blood (and yellow silk glands) spine white- silk. Ordinary races 

 with yellow blood spin yellow sillk; races with white blood spin white silk. A pure-bred 

 yellow-blood, white silk X pure white-blood, white silk, gives in I'\ all yellow-blood, yellow- 

 silk, i.e., yellow blood is completely dominant over white, white silk disappears, replaced by 

 yellow. F 2 = 9 yellow blood ami yellow silk + 3 yellow blood, white silk -+- 4 white blood and 

 white silk. Interaction between two ^enes occurs, C turning blood yellow, hut by itself not 

 affecting silk, and )' which affects visibly neither blood nor silk unless combined with C, 

 when it makes silk yellow. Abundant evidence from F 3 and back crosses with both pure 

 parent breeds sustains this interpretation. — Pure white-blood white-silk strains differ in re 

 Y, being demonstrably cc Y Y, cc Yy, or cci/y. Tested by mating with CC Yy (i.e., Fi ex yel- 

 low blood, yellow silk X yellow blood, white silk), cc Y Y uniformly threw all yellow blood and 

 yellow silk, ccyy uniformly threw 50 per cent yellow blood and yellow silk, 50 per cent yellow 

 blood, white silk. For 6 generations of white these tests were repeated, neither strain show- 

 ing any tendency toward ccYy, which by same test threw 3 yellow blood and yellow silk: 1 

 yellow blood, white silk. — /. H. Gcrould. 



799. van Herwerden, M. A. [Rev. of: Conklin, Edwin G. Heredity and environment 

 in the development of men. 2nd cd., 550 p. Princeton Univ. Press: Princeton, 1918.] Ge- 

 netica 1: 553-554. Nov., 1919. 



800. van Herwerden, M. A. [Dutch rev. of : Guyer, M. F., and E. A. Smith. Studies 

 on cytolysins. I. Some prenatal effects on lens antibodies. Jour. Exp. Zool. 26: 65-82. 1918.] 

 Genetica 2: 60-61. Jan., 1920. 



801. van Herwerden, M. A. [Dutch rev. of: Kuttner, Oloa. Untersuchungen iiber 

 Fortpflanzungsverhaltnisse und Vererbung bei Cladoceren. (Studies on reproductive relations 

 and heredity in Cladocera. Inaug.-Diss. Freiburg. 1909; Internation. Rev. d. gesamm. Hydro- 

 biol. 2: 1909. — Banta, A. M. Sex and sex-intergrades in Cladocera. Proc. Nation. Acad. 

 Sci. [U. S.] 4: 373. 191S.] Genetica 2: 68-69. Jan., 1920. 



802. von Graevenitz. [German rev. of: Gates, R. R. On the origin and behavior of 

 Oenothera rubricalyx. Jour. Genetics 4: 353-360. 1915.] Zeitschr. indukt. Abstamm. Ver- 

 erb. 21:191. Sept., 1919. 



803. von Graevenitz. [Rev. of: Saunders, Edith R. On the occurrence, behavior 

 and origin of a smooth-stemmed form of the common foxglove (Digitalis purpurea). Jour. 

 Genetics 7: 215-228. 1918.] Zeitschr. indukt. Abstamm. Vererb. 21: 187-188. Sept., 1919. 



804. von Graevenitz. [German rev. of: Saunders, Edith R. Studies in the inherit- 

 ance of doubleness in flowers. II. Meconopsis, Althaea, and Dianthus. Jour. Genetics 6: 

 165-1 84. 1917.] Zeitschr. indukt. Abstamm. Vererb. 21: 1SS-189. Sept., 1919. 



805. von Graevenitz, [German rev. of: Sutton, Ida. Report on tests of self-sterility 

 in plums, cherries and apples at the John Innes Horticultural Institution. Jour. Genetica 7: 

 281-300. S fig. Aug., 1918. (See Bot. Absts. 1, Entry 945.)] Zeitschr. indukt. Abstamm. 

 Vererb. 21: 191-192. Sept., 1919. 



806. von Seelhorst, C. Transmission of characters. Jour. Landw. 66:141-162. 191S. 



807. von Tschermak, E. Steigerung der Ertragsfahigkeit der Tomaten durch Bastard- 

 ierung in der ersten Generation. [Increase of productivity of tomatoes through hybridization 

 in the first generation.] Nachr. Deutsch. Landwirtschaftsgesell. Osterreich 1918: 425-426. 

 1918. 



nOTANICAL ABSTRACTS, VOL. IV, NO. 1 



