LIXNEAN SOCIETY OF LONDOX. xlvii 



one form being the spores produced by copulation (zygospores), 

 the other the asexual fruit or spores proper. The latter are pro- 

 duced in large cells at the apex of the threads, as in the genus 

 Mucor. The threads with the mucoriniform fruit have been 

 described by Link as a distinct fungus, under the name of Sporo- 

 dinia grandis. 



The second part of the " Beitrage zur Morphologie und Phy- 

 siologie der Pilze " *, produced conjointly by MM. de Bary and 

 Worouin, contains observations upon Ascoboliis, Mucor, and 

 Peronospora. The general remarks upon the development of 

 Ascoholus pulcherrimus are too detailed to be referred to at any 

 length ; but it is worthy of remark that M. Woronin has 

 discovered, in the early stages of growth, the formation of a 

 peculiar cellular body, and the attachment to it of other cells, 

 thrown out from the neighbouring mycelium, quite analogous to 

 what has been before observed by De Bary in the case of Tlry- 

 siphe ; and he states that he has seen the same process (which 

 may possibly be a process of impregnation) occur in the early 

 stages of Pezisa scutellata and Peziza granulata. A very inter- 

 esting fact, noticed for the first time by M. "Woronin, is the 

 occurrence on the mycelium of Ascoholus pioldierrimus of resting 

 spores, which, after being thoroughly dried and passing the 

 winter in a state of quiescence, germinate freely on the application 

 of moisture in the spring. 



The observations on Mucor Mucedo are directed to show that 

 the common mould which goes by this name has three, if not four, 

 different forms of fruit ; and the authors have satisfied themselves 

 that the mould called Thamnidium by Link (but which is better 

 known under Corda's name of AscopJiora elegans') and the mould 

 described by Messrs. Berkeley and Broome as Botrytis Jonesii 

 (which is made into a new genus by Freaenius, under the name 

 of ChcBtocladiimi) are only varieties of the fruit of Mucor Mucedo. 

 The authors have been unable to verify Bail's statements as to 

 the identity of Mucor Mucedo with yeast, AcTilya, Saprolegnia, 

 and Entomophtliora (or Empusd), although they confirm that 

 writer's opinion as to JEntomophthora being only a stage in the 

 development of Achlya prolifera. In Mucor stolonifer MM. de 

 Bary and Woronin have discovered the existence of a second form 

 of fruit, viz. zygospores produced by the copulation of two cells 

 in a manner precisely similar to what takes place in Syzygites. 

 They seem premature in assuming the probability of the occurrence 

 * Abhandl. d. Senckenb. natiirf. Gesellschaft, V. Bd. (printed separately). 



