4J^ 



drop culture or by the epidermis o€ various fruits. ITiis 

 writer considers that they function as holdfasts and that 

 they result from a contact stimulus acting upon spores or 

 tubes which are not well nourished. That such bodies are 

 frequently formed when germ tubes come in contact with the 

 cover glass of a hanging drop culture, has often been dem- 

 onstrated in the present studies. They are especially char- 

 acteristic of cultures with certain salt solutions at con- 

 centrations somewhat below that at which germination is 

 entirely suppressed but above that at which normal devel- 

 opement occurs. Here then formation does not appear to be 

 related to any contact stimulus, however. In some cases 

 swollen bodies are produced which have the form of appress- 

 oria but which are hyaline like the usual spores and germ- 

 tubes of this fungus, thus apparently differing from the 



appressoria only in not being brown or black in color. In 



will be used 

 the descriptions which follow the term appressoria/to de- 

 note the dark colored, appressorium-like bodies and the 

 swellings of similar form but without dark appearance will 

 be termed hyaline appressoria. These terms are applied 

 merely in a descriptive way, without intended implication 

 that the bodies thus designated may not be physiologically 

 or otherwise different from the appressoria of the mycolo- 

 gists. 



In concentrations of PbCNOgjg from 0.0001m to 

 O.0CO05m most of the germination observed took the form of 



