No. 4, January, 1921] GENETICS 251 



1711. Kroon, H. M., and G. M. van der Plank. De inschrijving van paarden In de 

 stamboeken. [Description of horses in the pedigree books.] Genetica 2 : 347-364. July, 1920. 



1712. Kuiper, K., Jr. Steriele Soortsbastaarden. [Sterile species hybrids.] Genetica 

 2:289-299. 6 fig. July, 1920. 



1713. Lehmann, E. Reply to Renner's explanation. Biol. Zentralbl. 40: 288. June, 

 1920. [See Bot. Absts. 6, Entry 1112.] 



1714. Lichtenstern, R. Bisherige Erfolge der Hodentransplantation beim Menschen. 

 [Results thus far achieved by the transplantation of testes in man.] Jahreskurse f. iirztliche 

 Fortb. April, 1920. [Cited from review by Benders, Genetica 2:374-375, July, 1920. See 

 also Bot. Absts. 6, Entry 1634.] 



1715. Lotsy, J. P. [Dutch rev. of: Bartsch, P. Experiments in the breeding of Cerions. 

 Dept. Marine Biology, Carnegie Inst. Washington Publ. 282. 55 p., 59 pi. Washington, 

 1920. Genetica 2 : 366-367. July, 1920. 



1716. Lotsy, J. P. [Dutch rev. of: von Wettstein, Fritz. Vererbungserscheinungen 

 und Systematik bei Haplonten und Diplohaplonten im Pflanzenreich. (Genetical phenomena 

 and taxonomy in haplonts and diplohaplonts in the vegetable kingdom.) Zeitschr. indukt. 

 Abstamm. Vererb. 21 : 233-246. Nov., 1919.] Genetica 2 : 379-384. July, 1920. 



1717. Lundborg, H. Hereditary transmission of genotypical deaf-mutism. Hereditas 

 1:35-40. 1920. — Acquired deaf-mutism may be both of intra- and extra-uter'ne orgin. 

 Consequently "congenital deafness" is not always of an inheritable nature. Acquired deaf- 

 mutism is far more common than inheritable deaf-mutism. The treatise of Bergh is criti- 

 cized. Author rejects the hypothesis of Plate that deaf-mutism is a dihybrid character. 

 There is every probability, as the author suggested in 1912, that deaf-mutism is transmitted 

 as a simple Mendelian factor. — K. V. Ossian Dahlgren. 



1718. Lynch, R. Irwin. Hybrid cestrums. Gard. Chron. 67: 220. May 1, 1920.— 

 Relates to hybridizing of Ceslrum elegans (fem.) with C. Parqui, with view to secure bright- 

 ness of flower with hardiness. Male parent stated to be almost absolutely dominant. — 

 J. Marion Shull. 



1719. Mandekic, V. Nesljectivonje nikih divjstore Koet Kukuruza. [Inheritance of 

 several characters in maize. 1 [Tcheckish.] Gospodarska smotra 1918: 5-8. 1918. — Length 

 and other ear characteristics for different lines are hereditary. Correlations of ear length 

 with other traits were observed. Only in pure lines are traits transmitted well, and in selec- 

 tions from groups that are not pure lines transmission is uncertain. [From author's abstract 

 in Zeitschr. Pflanzenziicht. 7: 40-42. June, 1919.]—/. P. Kelly. 



1720. Mandekic, V. Prilog gojidbi Kukuruza. [Contributions to the breeding of maize. 

 [Tcheckish.] Gospodarska smotra 1918: 1-4. 1918. — Croatian round maize was bred at 

 Krizevci experimental farms following Williams's method. Experimentation on effects of 

 self- and cross-pollination gave results similar to those of Shull and East. Lessened vigor 

 on inbreeding is explained as due to increased homozygosity. [From author's abstract in 

 Zeitschr. Pflanzenziicht. 7:42-43. June, 1919.]—/. P. Kelly. 



1721. Masui, Kiyoshi. The spermatogenesis of domestic mammals. I. The spermato- 

 genesis of the horse (Equus caballus). Jour. Coll. Agric. Tokyo Imperial Univ. 3: 357-376. 

 S pi., 2 fig. 1919. — Although it is impossible accurately to count the chromosomes of the 

 spermatogonial metaphase, many symmetrical pairs of chromosomes are distinguishable. 

 The resting nucleus of the primary spermatocyte contains a large chromatic nucleolus which 

 persists throughout the growth stages and synapsis. A conspicuous idiosome also exists 

 in the primary spermatocyte. At the division of the primary spermatocyte, which is reduc- 



