ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 731 



J. C. Arthur* publishes a list of 54 species of rusts on Composite 

 from Mexico. There are 18 new species recorded. Most of them have 

 been collected by E. W. D. Holway. Diagnoses of the new species are 

 published, with descriptive notes. 



J. L. Sheldont writes on " the effect of different soils on the develop- 

 ment of the carnation rust." He planted a series of 170 cuttings of 

 carnations in different soils, chiefly sand mixed with clay and organic 

 matter, and inoculated all of them. Only 3 plants escaped the disease. 

 He found as a result of soil influence that (1) the intensity of colour 

 of the host-plant was proportional to the amount of clay in the soil ; 

 (2) the growth of the host was proportional to the amount of organic 

 matter, nitrogen, and silt in the different soils ; (3) the more gravel 

 and sand in the soil, the longer it was before the uredospores broke 

 through the epidermis after an inoculation had been made ; (4) the 

 soils that were favourable for the development of the host were also 

 favourable for the development of the rust. 



M. A. CarletonJ gives his experience of rusted corn. Excess of 

 moisture and delay in the ripening of the grain largely favour the 

 spread of the rust. Certain kinds of wheat are less liable to attack than 

 others, and some varieties are immune. Care should be taken to choose 

 resistant varieties. 



H. Snyder,§ in an account of rusted wheat, states that the glutinous 

 material which should have gone into the grain was retained in the 

 straw, making it better for feeding than ordinary clean straw. There 

 is more protein present in both straw and grain when rust is there. 



Polyporacese of North America. — XL A synopsis of the brown 

 pileate species. — W. A. Murrill || includes under his Polyporaceas three 

 sub-families, Polyporege, Fomitea3, and Agaricese. No new species are 

 described, but many new genera are introduced. These are : Coriolopsis, 

 Flaviporus, Gerrenella, Nigroporus, Fomitella, Amauroderma, and Poro- 

 dcedalea. Murrill gives a full synonymy and notes on the different species. 



In a further paperlf he continues the subject, and publishes a 

 synopsis of the white and brightly-coloured pileate species. His 

 rearrangement again necessitates a large number of new genera. These 

 are : Irpiciporus, Dendrophagus, Spongloporus, Rigidioporus, Earliella, 

 Cubamyces, Coreoleolellus, Micropordlus, Flaviporellus, Aurantiporellus, 

 Aurantiporus, PyenoporeUus, and Pycnoporus. 



Mycological Notes.** — C. G. Lloyd publishes in No. 20 of his 

 Notes an account of the Lycoperdons of the United States. They fall 

 into the same groups as do those of other countries ; a few of the plants 

 described are identical with British species. He also describes the 

 genus Mitremyces, the species of which grow in the more southern 

 states of the country. No species is known from Europe, Africa, or 

 S. America. All have the openings lined with red, and in one species 



* Bot. Gazette, xl. (1905) pp. 196-208. f Tom. cit., pp. 225-9. 



J U.S. Dept, Agric, Farmer's Bull., No. 219 (1905) pp. 1-24. 

 § Bull. Miu. Agric. Exp. Stat., xc. (1905) pp. 218-31. 

 || Bull. Torrey B..t. Club, xxxii. (1 905) pp. 353-71. 

 \ Tom. cit., pp. 469-93. 

 ** Cincinnati, June 1905, pp. 2 -'1-44 (14 pis.). 



