ZOOLOGY AND BOTANY, MICEOSCOPY, ETC. 007 



W. N. Clute * figures and names a new bipinnatifid form of the 

 Christmas fern (Polystkham aero sticho ides), and also gives a brief 

 account of the sports of the so-called " Boston fern " of cultivation 

 (Nephrolepis exaltata). 



He also writes f about the wholesale destruction caused by the col- 

 lection and sale of ferns and evergreens for decorative purposes. 



He publishes $ a series of notes under the title " Pteridographia," 

 chiefly embodying items of information supplied by correspondents. 



C* E. Waters § publishes some details concerning the habit of Aspi- 

 dium cristatum, on the vertically growing fertile fronds of which the 

 pinnae are turned into a horizontal situation, or so as to catch the 

 maximum amount of illumination. He also points out that Equisetum 

 hy&mafo, which is recorded as "fruiting in summer," discharges its 

 spores in early spring. 



J. A. Graves || states the simpler characters by which Aspidium 

 spinulosum, its varieties intermedium, dilatum, and A. Boottii — may be 

 recognised and distinguished from one another. 



W. N. Clutef figures and describes Doryopteris pedata, a fern of 

 tropical America which is included in Pteris by some authors. 



He reports ** a new station in Florida for the rare Hypolepis repens, 

 only once found previously in the United States. 



He calls attention ft to a hybrid between Asplenium ruta-muraria and 

 A. trichomanes, found in Vermont in 1905. He discusses the application 

 of the laws of nomenclature to the new Struthiopteris yermanica f. 

 pubescens. Much confusion existing between Nephrodium patens and 

 N. molle, he shows how these two species can be distinguished from one 

 another and from N. stipulate. Finally, he publishes a further portion 

 of his checklist of the North American Fern worts, comprising the genera 

 Selayinella and Isoetes. 



C. F. Saunders IX records the re-discovery of Gheilanthes Parishii, in 

 the Colorado desert, after a lapse of twenty-seven years ; and Parish's 

 description of the locality in which it was originally found is reproduced. 



J. Shepard§§ shows how a nature-print negative may be easily 

 obtained from a fern or other plant, and used for making positive prints 

 of the original. 



South American Ferns. |||| — G. Hieronymus publishes a third in- 

 stalment of vascular cryptogams gathered by Alfons Stiibel during his 

 travels in Colombia, Ecuador, Peru, and Bolivia. It is an enumeration 

 of 133 species, including 14 new species and several new varieties. 



Descriptions of* New Species of Ferns.H — E. Roscnstock publishes 

 descriptions of four new species and a variety of ferns from Sumatra. 

 New Zealand, and South America. 



The same author *** also publishes descriptions of twenty-one new 



* Fern Bulletin, xv. (1907) pp. 71-4. 



t Tom. cit., pp. 77-9. % Tom. cit., pp. 82-9. 



§ Tom. cit., pp. 79, 80, 82. || Tom. cit., pp. 80-1. 



% Op. cit., xvi. (1908) pp. 33 -5 (pi.). ** Tom cit., p. 38. 



ft Tom. cit., pp. 46-57 (2 figs.). \\ Tom. cit., pp. 35-7. 



§§ Tom. cit., pp. 39-42 (2 figs.). |||| Hedwigia, xlvii. (1908) pp. 204-49. 

 ^f Fedde, Repertorium, v. (1908) pp. 13-17. *** Tom. cit., pp. 33-44. 



