IQQ GENETICS [BoT. Absts., Vol. VIII, 



Pfliiger's Arch. 176: 112. 1919.— Referring to similar work by Knud Sand on rats, the author 

 points out that he had earlier demonstrated transformation of clitoris into penis-like organ 

 in female guinea-pigs, into which testes had been grafted in place of ovaries.— A. Frank- 

 lin Shull. 



1100. Little, C. C. Is the fertile tortoise-shell tom cat a modified female? Jour. Ge- 

 netics 10 : 301-302. 1920.— Author points out superiority of his non-disjunction hypothesis to 

 Doncaster's theory of hormone action during embryonic life as an explanation for the 

 production of, and also for the sterility or fertility of, tortoise-shell tom cats.— i/. L. Ibsen. 



1101. MacBride, E. W. The method of evolution. Scientia 28:23-33. 1920.— A vig- 

 orous attack on the 'mutation theory' of evolution. Since the majority of mutations are 

 recessive in character, and result in 'cripples,' "it seems obvious" to the author "that 

 interesting as the appearance of inheritable potentialities of the mutations are they have 

 nothing to do with the evolution of species and that mutations have not furnished the ma- 

 terial for the historical evolution of plants and animals." The Lamarckian doctrine of 

 heritable changes, and consequently of evolution, occurring as the result of use and disuse, 

 in response to needs brought about by environmental change, is then wholeheartedly 

 espoused. The author feels that the experimental work of Kammerer has not been properly 

 evaluated nor accorded fair treatment by 'Mendelians.' Finally, he stigmatizes as the 

 'Weismannian nightmare' the idea of a 'germ-plasm' distinct from 'somatoplasm.'— L. /. Cole. 



1102. Malaquin, a. Reproduction sexuee et reproduction asexuee. [Sexual and asexual 

 reproduction.] Compt. Rend. Acad. Sci. Paris 171: 1403-1408. 1920.— In the annelid family 

 Serpulidae, Salmacina Drjsteri (Huxley) has sexual and asexual forms which have developed 

 under apparently the same conditions. In 772 individuals there were 93 sexual hemaphro- 

 dites, 245 divided or preparing to divide asexually, and 434 unclassified. At the season of 

 sexual activity in the sexually reproducing forms the asexual animals show an increase in 

 size of sex glands and functional activity to almost the normal condition.— D. F. Jones. 



1103. Metz, Charles W., and Jose F. Nonidez. Spermatogenesis in the fly, Asilus 

 sericeusSay. Jour. Exp. Zool. 32: 165-185. 2 pi. 1921.— The spermatogonia! chromosomes 

 are 10 in number, arranged in 5 pairs; the sex chromosomes have not been identified. The 

 paired association of chromosomes is retained up to and through the final spermatogonia! 

 division. Synapsis is effected in telophase at the beginning of the growth period by the 

 intimate association of chromosomes that were already paired in anaphase, and the union 

 effected at this time persists throughout the succeeding growth period. No leptotene or 

 zygotene stages, in the usual sense, could be found. Tetrad structures are not visible. The 

 1st maturation division appears to be reductiona! for all the chromosomes.— ^eriram G. 

 Smith. 



1104. Nachtsheim. [German rev. of: Armbruster, Ludwig. Bienenziichtungskunde. 

 Versuch der Anwendung wissenschaftlicher Vererbungslehren auf die Ziichtung eines Nutz- 

 tieres. (The art of breeding bees. An experiment in the application of scientific genetics 

 to the breeding of a domestic animal.) 22 fig. Th. Fisher: Leipzig and Berlin, 1919.] Biol. 

 Centralbl. 40:575-576. 1920. 



1105. NoACK, KoNRAD. [German rev. of: Correns, C. Vererbungsversuche mit bunt- 

 blattrigen Sippen. I. Capsella bursa-pastoris albovariabilis und chlorina. (Genetical 

 studies with variegated races. I. Capsella bursa-pastoris albovariabilis and chlorina.) Sitz- 

 ungsber. K. Akad. Wiss. Wien 34: 585-610. 1919 (see Bot. Absts. 4, Entry 551).] Zeitschr. 

 Bot. 12:675-678. 1920. 



1106. NoACK, KoNRAD. [German rev. of: Correns, C. Vererbungsversuche mit bunt- 

 blattrigen Sippen. II. Vier neue Typen bunter Periklinalchimaren. (Genetical studies with 

 variegated races. II. Four new types of variegated periclinal chimeras.) Sitzungsber. K. 

 Akad. Wiss. Wien 44:820-857. 1919 (see Bot. Absts. 4, Entry 550).] Zeitschr. Bot. 12: 

 678-680. 1920. 



