324 Morphologie und Teratologie. — Physiologie. 



or series of potentially sexual cells. In considering the origin 

 of archegonia and antheridia the author confines himself to the 

 older, more generalized forms illustrated in the existing Liver- 

 worts and Mosses. These he regards as to be dirived from a 

 multicellular sporangium or gametangium, such as are found 

 among existing Phaeophyceae. Since such structures are only 

 indicated in a few existing Chlorophyceae he places the existing 

 heterogamous green Algae away from the main line of descent 

 and assumes extinct groups possessing such multiceikilar 

 sporangia. He traces the influences acting in the transition to 

 a iand habit and the oogamous condition and explains the 

 origin of the wall of cells in relation to the need of protection 

 involved by the land-habit. Diagrams illustrating the suggested, 

 stages of transition and a phylogenetic tree embodying the 

 author's view of the origin of the Bryophyta from an extinct 

 group of Chlorophyceae are contained in the text. 



W. H. Lang. 



Rendle, A. B., The origin of the Perianth in Seed- 

 plants. (New Phytologist. Vol. II. 1903. p. 6ö.) 



The author criticises the extended application of the views 

 put forward by Worsdell in the preceeding number of this 

 Journal. He cites especially examples of Salicaceae, Ciipiiliferae, 

 and other presumably primitive Orders as showing that the 

 origin of the perianth is not invariably to be sought in the 

 modification of members of the androecium. w. H. Lang. 



Angeloni, L., Acclimatazione dei Tabacchi tropicali 

 col sistema del rinsanguamento. (Boll. tecnico coltiv. 

 tabacchi. [Scafati.] Anno I. p. bl— 71. 1902.) 



Les experiences ont ete faites sur les graines du tabac de 

 Sumatra. L'auteur en a etudie la resistance ä nos conditions 

 de climat et les variations des caracteres qui s'ensuivent; puis 

 11 a experimente l'amelioration moyennant la fecondation arti- 

 ficielle par le pollen obtenu des plantes des pays originaires. 

 La conclusion a ete affirmative. A. Terracciano. 



Perrotta, Andrea, Adattamento carnivoro delle foglie 

 normali aeree. (Rivista italiana di Scienze naturali. 

 Anno 22. No. 9—10. p. 128—131. No. 11 — 12. p. 159 

 — Ib2. 1902.) 



Expose populaire de nos principales connaissances sur 

 l'adaptation des feuilles ä capturer de petits animaux et ä 

 secreter un liquide qui excerce sur la proie une action diges- 

 tive. L'auteur decrit rapidement les trois types des feuilles 

 carnivores, c'est ä dire: 1. feuilles immobiles, dans lesquelles 

 le mouvement s'accomplit par les poils glandulaires; 2. feuilles 

 mobiles pour la capture; 3. feuilles ascidiophores. 



A. Terracciano. 



