Ib'JlJj MICROSCOPICAL JOURNAL. 151 



kuown, but probably the later editions have Immmi brought 

 lip to (iate. For the Ureclinefu and Ustilagin<>;i' the student 

 iri,-iv consult ''Dr. Plowri^ht's Moii()^ra{)li," and i'or'niost 

 e othfM- gro;i|)s — except the last two, on which I 

 know no modoin work in English — Mr. Masset^s "British 

 •'\ingtis 7'lnra " With reference to plants injurious to 

 trees and croos, we liave Dr. W. G. Smith's 'n)iseases of 

 Field and Garden Crops," and especially the English edi- 

 tion of Tubeufs "IMseases of PLauts induced by Cryiito- 

 garuic Parasites." 



In conclusion, I wish to say that the groups have not 

 been dealt with in any sort of systematic order. They 

 have been taken rather in a kind of biological sequence, 

 according to the nature of the substances on which they 

 live. [ have used the word spore throughout as indicat- 

 ing the reproductive body, no matter how it has been 

 formed — whether naked, in asci and so forth. Within 

 the limits of such an article as this it has been impossi- 

 ble to touch more than the extreme fringe of the sub- 

 \;ct, whicli to treat in detail would occupy not one but 

 several lii-gc^ \olunies. My leading idea has been To 

 t>tiujulale pel .sous desirous of doing some microscopic 

 work, and in doultt as to what branch to choose, to select 

 this most fascinating study, and to leave them, not sati- 

 ated, but rather like Oliver Twist, "asking for more" 

 ill I'.'rmation. — III. Afin. Mic. 



Oil The Exhibition of Live Animals at Soirees. 



M.\RCUS HARTOG. 

 The exliibirion of P<dyzoa, Hydrozoa, Rotifers, Crus- 

 tacea, etc., has always been a matter of diificnlty, and the 

 following details of a method which avoids the constant 

 need of watching to prevent evaporation, etc., may be 

 found of interest. The animals are mounted in a hang- 

 ing: drop of water on the under side of the cover-glass. 



