578 Allgemeines. — Anatomie. 



Wiener Universität und zugleich des 30jäiirigen Professoren- 

 jubiiäums des Gründers dieses Instituts, des Hofrates Prof. Dr. 

 Julius Wiesner, herausgegeben worden ist. Im Vorworte 

 und in der Einleitung wird die Geschichte des Instituts ent- 

 wickelt und die Biographie und die Verdienste des Gründers 

 gegeben. Auf p. 1 — 128 folgt das genaue Verzeichniss der 

 zahlreichen wissenschaftlichen Arbeiten des Gründers, verfasst 

 von L. und K. Linsbauer; die pp. 129 — 251 sind dem Ver- 

 zeichnisse der Arbeiten aus W ie sn er 's Schule gewidmet (Verf. 

 V. Port heim). Matouschek (Reichenberg). 



GWYNNE-V AUGHAN, D. T„ Observations on the Anatom y 

 of SolenostelicFerns. Part II. (Annais of Botany. Vol. 

 XVII. No. LXVIII. p. 689—742. Plates 33—35. 1903.) 



A vascular System which may be regarded as typically 

 solenostelic is shewn to exist in the stems of about 25 different 

 Ferns and the slight variations in structure that occur among 

 these are described; the most prominent being found in four 

 species of Hypolcpis where the solenostele is complicated by 

 the presence of certain small free vascular Strands connecting 

 up the margins of the leaf-trace with those of the leaf-gap and 

 of the lateral shoots. A number of Ferns are also described 

 the vascular Systems of which are more or less closely related 

 to the solenostelic type and they are used as examples to illu- 

 strate and explain the methods by which a transition may 

 tak€ place from the solenostele to the more complicated 

 dictyostelic arrangements found in the majority of the Poly- 

 podiaceae. 



The internal accessory Strands found within the nor- 

 mal stelic ring of Dicksonla nibiginosa, Pteris lata, var. 

 Karsteniana and others are then described and it is sugge- 

 sted that they have been derived by the elaboration of the es- 

 pecially thickened leaf-gap margin found in Dicksonia apii- 

 folla. A progressive series of stages would have to be passed 

 through the most interesting of which being that described in 

 Dicksonia adiantoides. In this Fern the thickened leaf- 

 gap margin has developed into a projecting ridge on the in- 

 ternal surface of the solenostele which runs from one leaf-gap 

 margin to the next throughout the stem. 



In dealing with the Cyatheaceae it is shewn that the 

 internal accessory vascular Strands characteristic of the order 

 are essentially cauline and are not decurrent leaf-traces. The 

 vascular anatomy of the seedling of Alsophila excelsa is 

 described in detail, with especial reference to the first appea- 

 rance of these internal Strands, and it appaers that they also 

 are due to the elaboration of a local thickening of the leaf-gap 

 margin. 



The peculiar stele of Davallia repcns, which has an 

 internal excentric core of phloem, is described in detail and is 



