116 Jour?ial of Mycology [Vol. IS 



Blakeslee, Albert Francis. 



In the September number of the Botanical Gazette (1906) 

 Albert Francis Blakeslee discusses the "Differentiation of sex in 

 Thallus Gametophyte and Sporophyte." Referring to the pre- 

 vious paper in which was given an account of Zygospore Germi- 

 nations in Some Mucorineae, the author says the purpose of the 

 present paper is to point out the bearing which the investigations 

 already made in this group may have upon the questions of sex- 

 uality in other forms. 



Kauffrnan, C. H. 



A contribution from the Botannical Department of the Uni- 

 versity of Michigan, published in the Botanical Gazette, Septem- 

 ber 1906, is devoted to "Cortinarius as a Mycorhiza-producing 

 Fungus." The author, C. H. Kauffman, publishes a new species, 

 Cortinarius rubipes, and its study is the basis for the article here 

 noted. He says his own observations seem to show that it is 

 undoubtedly a fact that one fungus may be attached to trees of 

 very different families. Cortinarius rubipes Kauff. is connected 

 with three forest symbionts. 



Smith, Ralph E. and Smith, Elizabeth H. 



Under the title of "A New Fungus of Economic Import- 

 ance" the authors give an account of a destructive rotting of lem- 

 ons in Southern California, which proved to be caused by a hith- 

 erto undescribed fungus. A new genus is proposed, Pifhiacystis, 

 which differs from Pithium in mode of swarmspore formation, 

 and from Pithiopsis in habit. It is more exactly intermediate 

 between the Saprolegnieae and Peronosporeae than either of 

 these genera. The new species is called Pifhiacystis citrophthora, 

 parasitic on lemons, and occasionally on other Citrus fruits, caus- 

 ing decay of green fruit on the tree and in the storehouse. 



Journal of Mycology, Vol. 13. Jan. 1907. 



The table of contents of this No. reads as follows: Long — 

 Notes on New Species of Ravenelia ; Atkinson — A New En- 

 toloma from Central Ohio ; Kcllerman — F"ungi Selecti Guate- 

 malenses. Exsiccati, Decade I ; Morgan — North American Spe- 

 cies of Lepiota (continued) ; Kellerman — Index to North Amer- 

 ican Mycology; Index to A^olume 12. 



Long, W. H. 



In the "Notes on new or rare Species of Ravenelia," Prof. 

 W. H. Long publishes critical comments on many species of this 

 interesting genus, and describes two new species, namely : Ra- 

 venelia piscidiae (for Florida) and Ravenelia arthuri (from 

 Jamaica). He states that three characters of great importance 

 should always be noted, to-wit, ( i ) the position of the sori, 



