iiorsoN. — cTLTruF, sTrniEs of fixgi. 255 



of the cirri of ascosporcs ami llicrcforo probably pure. Tiu' \vrit(.-r 

 has under cultivation transfers of this same fungus but although it 

 has been grown on various kinds of media, both very rich and very 

 poor in nutrient material, and hard and soft, etc., yet thus far he has 

 not hUC'Cccdiul in obtaining either the chlamydospores or the "Ilarzia- 

 like" fructification. This is probably due to tlie fact that tiie pro- 

 duction of these structures is secured under certain peculiar conditions 

 not readily controlled. 



In general this fiuigus resembles M. papiUata in form and habit of 

 growth. The predominant type of reproduction in both is by asco- 

 spores the production of bidbils being scanty, while in some cases, as 

 on attenuated agar cultures, they are not produced at all. The peri- 

 thecium of M. cervicula which is usually 400-500 ^ in diameter, has a 

 definite neck 85-140 ^l in length, while M. papillata which is slightly 

 smaller, seldom reaching 500 fx in diameter, has no neck but often 

 a papilla-like structure from which the setae arise. ]\Ioreover, the 

 former probably produces conidiophores of the "Harzia type" and 

 also chlamydospores which resemble those of Acrcmoniclla atra. 



The BuWih'. — The mycelium is colorless, procumbent or only slightly 

 aerial, growing evenly over the surface of the suljstratum. The 

 hyphae, which are copiously septate, measure 5-7 yu in diameter, but 

 often large swellings occur in them which seem to act as storage organs 

 and from which several branches may grow out as shown in Figure 21, 

 Plate 3. These are found not infrequently on attenuated artificial 

 media such as agar alone without any nutriment, on which the mycel- 

 ium is very scanty, being barely visible even with the aid of a hand 

 lens. On such media, it should also be noted that as in M. papil- 

 lata, bulbils are not produced. It further reseml)les the latter in 

 the mode of development of the bulbils, the primordiimi consisting of a 

 group of intercalary cells. It is, however, subject to considerably 

 greater \ariation and many irregular, incomplete or imperfect forms 

 appear. Since the mode of development is essentially the same as 

 that descril)ed for M. papillnta, it will be unnecessary to repeat 

 the description here. They are, however, produced very sparingly 

 on most media, and on some, such as that just mentioned, do not occur 

 at all, although on a rich substratum not too hard, such as sugar, 

 chestnut or bran agar they are produced quite abundantly. 



Thr pcriflurlinu. — In general the perithecium resembles that of 

 M. papillata, but is clearly distinguished by having a definite neck. 

 They, however, vary considerably in size, sometimes reaching 550 ju 

 in diameter, their form often being somewhat contorted^ with only 



