MOhCHKLLA -AHCObOJJ.'H. 



327 



They do hot attain the length of the asci, Anci and paraphyses 

 arise as free hyphal ends from the densely interwoven, flatly 

 extended, sub-hymenial tissue. This 

 arises from the more loosely-constructed 

 inner hyphal texture of the fructifica- 

 tion. Addition of iodine colours the 

 mnflsm of epiplasm in the asci reddish* 

 biown. This reaction is characteristic 

 of epiplasm, and is considered to be ft 

 reaction for glycogen. The character- 

 istic peculiarity of this reaction is 

 shown upon warming. To the prepara- 

 tion lying in water, and coloured by 

 iodine, some water is added, yet not so 

 much as to decolorise it; then it is 

 carefully warmed, without attaining the 

 boiling-point, and held over white paper, 

 in order to see if the colour has become 

 paler. When this happens, the prepara- 

 tion is rapidly cooled, and the darker 

 coloration, in large preparation* even 

 visible with the naked eye, again 

 appears. With the aid of iodine, the base of many asci can be 

 traced pretty deeply into the snb-hymenial tissue. The content* 

 of the spores, paraphyses, sub-hymenial tissue, and of the tissue 

 in the interior of the fructification colours at the same time 

 yellow or yellowish-brown, 



Atcobolux furfuraaeu*. When fresh horse*, or, still better, 

 cow-dung is placed in a shallow glass vessel, covered with a glass 

 lid, and allowed to stand in a moderately strongly-lighted place, 

 a luxurious fungus vegetation begins at once to develop. First 

 appears Mueor Mucedo, with its parasites, as described on p, 317 '> 

 later (upon cow-dung) comes still another Mucorine, which, by 

 reason of its hemispherical black sporangia, thrown off by ft special 

 swelling layer, may be referred to Pilobolu* cryttallinm. After 

 two or three weeks, when the Mueorines have for the most part 

 completed their development, will appear the hymenomycetous 

 i mm, with small cap and long stalk ; at the same time may 

 appear on the substratum small pear-shaped cups, which are 

 the fructifications of an Ascomycete of the section Diftcomycetes, 

 belonging to the genus Ateobolm, and probably A. fwrfuraceu*. 



KJ<,. 117, Portion of th* by- 

 <>( if'/rchella vvwltnia, 

 k, ufo- 



