3° The Botanical Gazette. [January, 



exclusion from the present work is indicative of a conservative course 

 of treatment. • 



r 



The morphological part comprises an account of the vegetative 

 organs, organs of fructification including the mechanical contrivances 

 for freeing the spores, the structure and formation of the cell, and its 

 union into systems. 



The physiological part opens with seventy pages upon the chemistry 

 of the fungi, which contain a vast amount of information, as may be 

 judged by the fact that there are nearly three hundred footnote 

 references to literature. The part is continued in an account of 

 respiration, development of heat and light, external forces influenc- 

 ing life processes, agents harmful to life, phenomena of movement 

 such as heliotropism, hydrotropism, geotropism, rheotropism, move- 

 ments due to contact and to chemical and electrical stimuli, and finally 

 nutation and hygroscopic movements. 



The biological part treats of saprophytism and parasitism, the means 

 of infection, effect of the parasite upon the host, symbiotism, and the 

 enemies of fungi. 



In the systematic part the following classification is used: 



I. Phycomycetes 



a Chytridiaceae {Olpidiacece, etc.) 



b Oomycetes {Sapr&legniacete, Pcronospore«\ etc.) 



c Zygomycetes iMucfiracea, EntomophthoracetE, etc.) 



II. Mycomycetes • - 



a Basidiomvcetes ( Tremellinem y Pohporca\ Agaricintce, Lvcopenlaoo. 

 etc.) * 



b U red in ere. 



€ Ustilagineae. 



d Ascomvcetes USaceharomycefes, Erysiphem, Tuberacea, Sphcerietz, 

 Pezizcuea, etc.) 



The work is copiously illustrated with well drawn figures, which, 

 however, are not so well engraved and printed as one would expect. 



A good index of illustrations and another of subjects closes the 

 volume. 



Altogether no work of equal importance has heretofore appeared on 

 the general subject of fungi, and its speedy translation into English is 

 much to be desired. 



1 1 ^ 



The siha of North America 



North America has always been noted for its forests, and permanent 

 record concerning them should be made before thev have been more 



extensively devastated. The only work upon the subject, riving detailed 



