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Mycologia 



Dr. Fred J. Seaver spent the first week of June at Ithaca, New 

 York, collecting fungi in collaboration with Cornell University, 

 the Brooklyn Botanic Garden, and Syracuse University. Three 

 main excursions were made, one to Enfield Gorge, one to Lab- 

 orador Lake, about forty miles from Ithaca, and one to the bogs 

 of Mud Pond Basin near McLean. Other local trips were made 

 in the gorges immediately adjacent to the college campus. Where 

 necessary, transportation facilities were provided by the exten- 

 sion cars of the Agricultural College and the various trips were 

 attended by a number of the graduate students and staff of the 

 department of plant pathology under the direction of Professor 

 H. H. Whetzel. While an exact count has not yet been made, the 

 trip will probably add more than two hundred specimens of 

 ascomycetes and parasitic fungi to our collection. No special 

 attention was given to the higher fungi, since no one of the party 

 was particularly interested in them. 



Metaphanic and Progressive Variation in Beauveria: 

 Its Phyletic Significance 



The fungi of the Conidiosporae class are subdivided into 4 

 groups from the spore formation: 1°, Sporotrichae, where my- 

 celial hyphae directly yield conidia, 2°, Sporophorae, where 

 conidia bud from sporophores, 3°, Phialidae, where conidia are 

 formed from a differentiated bottle-like hypha called " phialida," 

 and 4°, Prophialidae, where the phialides, instead of springing 

 from undifferentiated vegetative hyphae, are only produced by 

 peculiar hyphae termed " prophialides." 



Daily observation of Beauveria glohulifera, collected from 

 mummified moths of Cnethocampa pityocampa in Arcachon, and 

 cultivated in hanging drops, shows that spore formation, in this 

 typical Philalidae, is at first a mere process of budding, — as in 

 Sporophorae, — and differentiates to the complex conidial system 

 of Prophialidae, as the cultures age. 



I. So long as the cultures are less than 10 days old the end 

 of the big mycelial hyphae may bud into great, oval, isolated 

 conidia, as is only observed in Sporophorae. 



