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COMPARATIVE MORPHOLOGY OF FUNGI 



great variability in the number of receptacle cells. The maj ority of genera 

 as Amorphomyces (Fig. 245, 1) and Arthrorhynchus (Fig. 251, 1) show only 

 two receptacle cells. In other genera, the receptacle may develop to a 

 small, flat cell complex. The perithecial receptacle arises directly from 



Fig. 251. — 1. Arthrorhynchus Cyclopodiae. Showing well-developed haustorium. 2. 

 Rhizomyces ctenophorus. Haustorium. 3. Enarthromyces indicus. Showing three mature 

 and three aborted perithecia. (1, 3 X 195; 2 X 145; after Thaxter, 1896 and 1908.) 



the basal cell of the germinating ascospore; hence it is called the primary 

 receptacle. In Dichomyces (Fig. 250, 1) the secondary receptacle is a 

 direct continuation of the primary and hence is not recognizable as such. 

 In Herpomyces, the secondary receptacle crawls along the substrate, so 

 that the fertile secondary branches seem to branch from a stroma. In 



