50 GENETICS [Bot. Absts., Vol. V, 



374. Fruwirth, C, Dr. Th. Roemer, and Dr. E. von Tschermak. Handbuch der land- 

 wirtschaftlichen Pflanzenziichtung. 4. Die Ziichtung der vier Hauptgetreidearten trad der 

 Zuckerriibe. [Handbook of agricultural plant breeding. 4. Breeding of the four chief cereals 

 and the sugar beet.] 3rd. ed., 8vo., xv + 504 V-, 42 fig- Paul Parey: Berlin, 1918. — See Bot. 

 Absts. 5, Entry 270. 



375. Gassner, S. Beitrage zur physiologischen Charakteristik sornmer- und wlnter- 

 annueller Gewachse, insbesondere der Getreidepflanzen. [Contribution to the physiological 

 characteristics of summer and winter annuals with special reference to the cereals.] Zeitschr. 

 Bot. 10: 417-4S0. 7 pi., 2 fig. 1918— See Bot. Absts. 5, Entry 271.] 



376. Gassul, R. Wachtrag zu meiner Mittellung iiber "Eine durch Generationen pra- 

 valierende symmetrische Fingerkontraktur." [Supplement to my contribution on a symmetrical 

 contraction of the fingers prevailing through generations.] Deutsch. Mediz. Wochenschr. 44: 

 1196-1197. 1918.— See Also Bot. Absts. 4, Entry 578, and next following Entry, 378. 



377. Gassxjl, R. Eine durch Generationen pravallerende symmetrische Fingurkontrak- 

 tur. [A symmetrical contraction of the fingers prevailing through generations.] Deutsch. 

 Mediz. Wochenschr. 44: 1197-119S. 2 fig. 1918. — In. a family from Mecklenburg-Schwerin 

 three successive generations have produced individuals with permanent bilateral hyper- 

 extension of the basal phalanges of the fourth and fifth fingers. [See also next preceding 

 Entry, 377.]— C. H. Danforth. 



378. Gatenby, J. Bronte. The cytoplasmic inclusions of the germ-cells. VI. On the 

 origin and probable constitution of the germ-cell determinant of Apanteles glomeratus, with a 

 note on the secondary nuclei. Quart. Jour. Microsc. Sci. 64: 133-153. 1 pi., 10 fig. Jan., 

 1920. — Author describes his attempts to determine the composition and origin of the germ- 

 cell determinant in the oocytes of the parasitic hymenopteran, Apanteles glomeratus. He 

 finds that it arises as a concentrated area at the posterior pole of the young oocytes; that it 

 is probably formed of albuminous material rather than of chromatin, fat, yolk, or glycogen; 

 and that the secondary nuclei have no connection with it. — R. W. Hegncr. 



379. Gatenby, J. Bronte. [Rev. of: Thomson, J. Arthur. Heredity. 3rd. ed., ix + 

 627 p., 47 fig. John Murray: London, 1919.] Sci. Prog. 14: 517. Jan., 1920. 



380. Geisenheyner, L. Uber einigen Panaschierungen. [On some variegations.] Verhandl. 

 Bot. Ver. Prov. Brandenburg 59: 51-61. 3 fig. 1918. 



381. Goebel, K. Zur Kenntnis der Zwergfarne. [To a knowledge of the dwarf ferns.] 

 Flora 11-12 (Festschr. Stahl) : 268-281. 6 fig. 1918.— Describes dwarf mutants (?) from two 

 spp. of Aspidium, one sp. of Drynaria (tropical), and two spp. of Platycerium. Mutation has 

 not yet been directly observed in culture. Dwarfs are characterized by smaller and fewer 

 cells, smaller or fewer bundles (or both), fewer sori, sporangia, and spores. Describes parallel 

 investigation of dwarf mutant from Salvia protensis. — Merle C. Coulter. 



382. Goldsmith, William M. A comparative study of the chromosomes of tiger beetles 

 (Cicindelidae). Jour. Morph. 32: 437-487. PL 1-10. 1919.— Five species of Cicindela were 

 studied, all of which conform to one type in regard to chromosome number and spermatogene- 

 sis. The male has a "double odd chromosome," the female two, making the formulae 20 -f- 

 Xx=22o", 20+Xx+Xx = 249 . In other Coleoptera two additional types are known, (1) 

 20+X+Y=22d", 20+2X=229 ; and (2) 18-r-X = 19d\ 18+2X=209 . In Cicindela spermato- 

 gonia are in syncytial cysts; the spermatocyte growth period includes, in sequence, the usual 

 diffuse, leptotene, synaptic (synizesis) and diplotene stages, giving rise to prophase bivalents. 

 The Xx complex is a single compound body in first division, going undivided to one pole, giv- 

 ing two types of second spermatocytes. X separates from x in anaphase and both divide in 

 second division. Spermatogonia each have one nucleolus, oogonia have two, corresponding 

 to sex-chromosome relations. Early stages of oocyte growth period correspond in general 

 to those of spermatocyte. — Chas. W. Metz. 



