ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 535 



produced a tomentum of multicellular hairs. The secondary roots bored 

 their way out throutjh the cortex and sclerenchyma to the surface, and 

 then passed downwards among the multicellular hairs of the tomentum 

 — thus giving the fossil sections the appearance of roots embedded in 

 an outer cortex or filling tissue. The roots likewise produced a tomentum 

 of their own. 



Cone and Fertile Stem of Equisetum.* — I. M. P. Browne pub- 

 lishes some contributions to our knowledge of the anatomy of the cone 

 and fertile stem of Equisetum. In the node of an Equisetum cone 

 the xylem consists of a woody ring or bands ; in the internode it breaks 

 up into definite strands, separated by parenchymatous meshes ; these 

 generally arise vertically above the leaf-traces. According to the degree 

 of development of the xylem, these meshes become closed above near 

 the node, or persist upwards through two or more internodes. The cones 

 of E. arvense, E. palustre, E. limosum. form a series showing increased 

 reduction of the xylem, the stele forming a more and more irregular 

 network of strands. Where the xylem is poorly developed, the alterna- 

 tion of tlie strands at the node is interfered with by the persistence of 

 the meshes. The anatomy of the axis supports the view that the 

 sporangiophores are whole appendages, and not lobes of a sporophyll. 

 The branching of the bundles near the insertion of the annulus indi- 

 cates a nodal character. In the upper part of the fertile stem of 

 E. limosum in place of a diaphragm was found an inverted hollow cone 

 of dark brown cells. 



Wound-reactions in Filicinese.f — H. S. Holden describes some 

 wound-reactions in Filicinean petioles, and the attempts made by the 

 plant to heal the affected area more or less perfectly by the production 

 of a pad of cambiform cells, by a deposit of gum or of cellulose. He 

 shows how the various tissues are affected, and figures their microscopic 

 appearance. 



Embryology of Selaginellacese.^ — H. Bruchmann gives an account 

 of the embryoldgy of Selaginellacefe. After a short introduction he 

 discusses the prothallium of the megaspore of SelagineUa denticulata, 

 S. nihricauUs, and S. Galeottii. He compares the prothallia of these 

 species with one another and with other known forms. He also treats 

 of the germination of the above species with comparisons. Finally, he 

 describes the parthenogenetic development of the Selaginellacefe, par- 

 ticularly in S. rubricaulis and S. spinulosa. 



Bryophyta. 



(By A. Gepp.) 



Recent Literature of Bryophyta.§ — -F. Cavers publishes some notes 

 on recent work on the Bryophyta, having selected for mention such 



* Ann. of Bot., xxvi. (1912) pp. 663-703 (2 pis. and figs.). 

 t Ann. of Bot., xxvi. (1912) pp. 777-93 (2 pis. and fig.). 

 ' X Flora, iv. (1912) pp. 180-224 (67 figs.), 

 f New Phytologist, xi. (1912) pp. 265-76. 



