4 Allgemeines. — Anatomie. 



Zahl von Fachsectionen. Der Verein nahm auch die Ver- 

 anstaltung von Vortragscyclen und Hochschulunterrichtscursen 

 („university extension") in die Hand. 



Matouschek (Reichenberg). 



Heald, F. T., Laboratory manual [in] elementary bio- 

 Iogy. VIII -t 287 pp. Binghamton, N. Y. (Miliard Clute 

 <£ Co.) 1902. 



A book intended to hold a middle course between causing 

 the student to verify described struetures and requiring him to 

 answer specific questions unaecompanied by descriptions. About 

 half of the course is devoted to plants and the remainder to 

 animals. Trelease. 



FORD, SlBILLE 0., The Anatom y of Ceratopteris thalictroides 

 (L.) (Annais of Botany. Vol. XVI. No. LXI. p. 95.) 



This paper presents a detailed aecount of the anatomy of 

 Ceratopteris together with some remarks upon its morphology. 

 The vascular System of the mature stem is described as con- 

 sisting of a ring of large steles surrounding a number of 

 smaller ones which arise as branches of the larger steles as 

 the latter pass out into the leaves. The small steles anastomose 

 with each other as they pass down in the central ground tissue. 

 and then end blindly. The young stein is simply polystelic, the 

 internal steles being wanting; moreover, it is shewn that the 

 polystely arises directly from the original monostele by repeated 

 bifurcation, no solenostelic stage being passed trough as in most 

 other Ferns. Two concentric rings of steles are found in the 

 mature petiole. The protoxylem in both stem and petiole lies 

 on the outer edge of the xylem, and the steles possess phloem 

 on both sides. The apex of the stem has the form of a curiously 

 elongated cone tipped by a three sided apical cell. 



Finally, it is deeided that Ceratopteris is more nearly rela- 

 ted to the Polypodiaceae than to any other group, but slighter 

 affinities may be traced to the Marsiliaceae. 



D. J. Gwynne-Vaughan. 



Tanslev, A. G. and Lulham, R. B., On a new type of Fern 

 stele, and its probable phylogenetic relations. 

 (Annais of Botany. Vol. XVI. No. 61. p. 157.) 



The new type of stele in question is found in the rhizome 

 of eight species of Lindsaya. It has the general appearance- 

 of a monostele, but in addition to the external phloem mantle 

 there is also a Strand of phloem completely imbedded in the 

 xylem mass, Iying near its dorsal surface. At each leaf-gap 

 this internal phloem becomes continuous with the external phloem 

 mantle of the stem stele and with that in the coneavity of the 

 leaf-trace. Again, just below each node a small Strand of 

 ground tissue surrounded by an endodermis oecurs in the centre 



