Morphologie und Teratologie. — Physiologie. 299 



fertilization about the tenth of June. In the development of the 

 pollen grain and the formation of the pollen tube nothing of 

 special novelty was made out. 



The egg was likewise formed after the usual manner. After fer- 

 tiHzationtheiertiiized nucleusdividesintotwonuclei, and thesesub- 

 sequently divide again simultaneously to produce four, which 

 settle down in the base of the archegonium after the charac- 

 teristic fashion of the Abietineae.Then another simultaneous 

 mitosis takes place, so that the number of free nuclei is in- 

 creased to eight. The description of the subsequent divisions 

 given by the author differs from that of Strasburger and 

 others, for instead of the four lower nuclei, which at this 

 time differ from those above in being compietely surrounded 

 by cell walls, giving rise to the three tiers of cells of the 

 proembryo, the upper partially free tetrad of nuclei first divides, 

 and its divi^ion is followed by a corresponding one in the 

 lower, walled in tier of nuclei. Of the resulting three tiers 

 of enclosed nuclei, one is consequently derived from the ori- 

 ginal Upper tetrad, and two from the lower tetrad. 



E. C. Jeffrey. 



Ramaley, Francis, The Pubescence of Species of Asfra- 

 galiis. (Torreya. Vol. III. No. 3. March 1903. p. 38—40.) 

 The author calls attention to the fact that two kinds of 

 trichomes are found on the leaf of species of Astragaliis. The 

 first arises from a thick base and is vertical to the epidermis 

 of the leaf. The second type of hair is two armed and 

 horozontal to the surface of the leaf, being attached near one 

 end by a vertical neck. The author suggests, that the structure 

 of the hairs may be usefui in the Classification of this systemati- 

 cally difficult genus. E. C. Jeffrey. 



LOEW, 0. u n d KOZAI, Y., Ueber Ernährungsverhältnisse 

 beim Bacillus prodigiosiis. (The Bulletin of the College of 

 Agriculture, Tokyo Imperial University. Vol. V. No. 2. 

 p. 137—141.) 



Als Ergebnisse ihrer Untersuchungen über die Bildung 

 eines bakteriolytischen Enzyms beim Bac. prodigiosiis führen 

 Verf. folgendes an: 1. Eine für die Produktion von Farbstoff 

 und bakteriolytischem Enzym günstige Nährstoffkombination 

 besteht aus Pepton 1 Procent, Essigsaurem Natron 0,2 Procent 

 und Asparagin 0,2 Procent. 2. Eine beträchtliche Vermehrung 

 stickstofffreien Materials gegenüber stickstoffhaltigem übt auf die 

 Entwickelung einen ungünstigen Effekt aus. 3. Natriumnitrat 

 ist nicht nur unfähig als Stickstoffquelle zu dienen, sondern 

 hemmt sogar die Entwickelung bei Gegenwart von Pepton. 

 4. Jodkalium und Fluornatrium in einer Verdünnung von 

 0,1 p. m. üben keine deutliche Reizwirkung aus. 5. Ein Ferro- 

 cyankaliumzusatz von 0,1 p. m. befördert die Entwickelung, 



