516 Morphologie, etc. — Varietäten, etc. — Phj^siologie. 



Matte refers to the inner series as the 'System perinucellaire' 

 and considers it equivalent to the integumental vessels of Lageno Stoma ; 

 the outer series is equivalent to the cupular bundles. 



The Suggestion, made by Oliver and Scott, that the canopj^ 

 of a Lagenostoma may have undergone simplification into the hard 

 integument of a cycadean seed, is strengthened by the structure 

 of The latter; it is probable that the fleshy sarcotesta of Cycas 

 corresponds morphologicalty to an adnate cupule. 



The boundary line between the stone and the outer flesh is 

 indistinct and the bundles of the latter are often partly embedded 

 in the stone layers: the redges seen on the ripe stone are also due 

 to the proximity of the bundles ot the outer flesh. The stone and 

 the inner flesh are alwaj^s distinct. In many Cycads the stone 

 consists of two layers, the inner of vertically running stone cells 

 and the outer of horizontally arranged cells. It is therefore probable 

 that the plane of fusion of the tw^o integuments is either between 

 the inner and outer stone layers or between the stone and the 

 inner flesh. 



The 'Wucherungen' of Ceratosamia may represent a third inte- 

 gument; similar upgrowths from the sporophyll occur in Stangeria 

 schisodon, where, in some cases, they completely enclose the 

 growing ovule. It is suggested that the cupule of Lagenostoma ma)' 

 have arisen in a similar manner, and that, by the adherence of a 

 similar cupule the outer integument of the Cycads has been formed. 



M. Wilson (Glasgow.) 



Spillman, W. J., The Mechanism of Heredity. (Science. Vol. 

 XXIV. p. 850-852. 1906.) 



The writer believes that our present knowledge of cytology 

 enables us to form a satisfactory theory of heredity. The chromatin 

 is regarded as the physical basis of heredity and cytological evidence 

 is cited to account for mutation, Mendelian unit characters and 

 gradual evolutionary changes. Charles J. Chamberlain (Chicag'o.) 



Gertz, O., Ett nytt fall af kristalliseradt Anthocyan. (Bota- 

 niska Notiser. H. 6, S. 295-301. Mit Textfiguren. 1906.) 



Bei der Urticacee Laportea nioroides Wedd. besteht das Grund- 

 parenchym in den nach der Blüte fleischigen, roten Perigonblättern 

 zum grossen Teil aus Anthocyanführenden Zellen, und zwar ist 

 dasselbe teils im Zellsaft gelöst, teils tritt es als Kristalle, resp. an 

 solche gebunden auf; amorphe Anthocyankörper sind nicht vorhanden. 

 Die Kristalle sind dimorph. In einigen Zellen sind sie raphidenförmig; 

 diese Anthocyanraphiden sind entweder parallel angeordnet oder 

 sie bilden strahlige Aggregate mit mehreren Zentren. In anderen 

 Zellen treten Aggregate von unregelmäszig gebogenen, äusserst 

 feinen Fäden, Anthocyandendriten, auf, die in jeder Zelle mehrere 

 Systeme bilden können. Sie kommen in der subepidermalen Schicht 

 reichlich vor. Die Anthocyankristalle sind überhaupt am kräftigsten 

 in den in der Nähe der Cystolithen- und Oxalatführenden Idioblasten 

 gelegenen Zellen. 



Das Verhalten der Kristalle zu verschiedenen Reagentien wird 

 mitgeteilt. Den gewöhnlichen Anthocyanreagentien gegenüber zeigen 



