HOTSON. — CULTURE STUDIES OF FUNGI. 201 



is well developed, 110-200 m in length. The ascospores differ from 

 those, already described, in being symmetrical. The other forms 

 have asymmetrical ascospores which are somewhat crescent-shaped. 



Besides the perfect form this species is said to have: microconidia 

 which resemble those of Acrostalagmus; chlamydospores that are 

 of the type of AcremxmieUa aim; and bulbils which he considers of 

 the same nature as similar structures described by Mattirolo. Berlese 

 succeeded in obtaining bulbils on the mycelium produced from asco- 

 spores but he failed to find any perfectly developed. 



Sphaeroderma bulbilliferum Berl. 



This species which is described by Berlese ('92) was found growing 

 on dead 'leaves of Vitis, Cissus, and Ampelopsis. It is said to have 

 several kinds of reproductive bodies, such as ascospores, bulbils, 

 conidia and chlamydospores. 



The perithecium is globose or sub-globose, 400-500 it in diameter, 

 without any neck, setae or papilla. These characteristics distinguish 

 it from any of the melanosporous forms already referred to. It 

 resembles M. anornala but is slightly larger and has no papilla. The 

 ascospores are brownish-black and asymmetrical. 



The bulbils are yellowish, nearly spherical, 80-150 n in diameter, 

 consisting of polyhedral cells and surrounded by a layer of empty 

 cortical cells. They are said to resemble quite closely those described 

 in connection with Melanospora Gibelliana. 



The conidia occur in chains on bottle-shaped sterigmata resembling 

 those of the melanosporous forms already referred to. 



The chlamydospores, which measure 32-40 X 24-25 n, are described 

 as yellow, oval, smooth, composed of two unequal cells, and formed 

 terminally on the ends of short lateral branches. 



"Ceratostoma" sp. indet. 



Bainier f '07) has reported that he has determined the connection 

 of a perithecium of the genus Ceratostoma with Papulospora asper- 

 gilliformis. He is of the opinion that the bulbils in this instance are 

 immature perithecia and that, under proper conditions as regards 

 nutriment and moisture, they may be induced to complete their 

 development. 



In this Form, the bulbil is produced by a short lateral branch 

 which coils ii]) spirally, the coils becoming quite compact. One or 

 more of the terminal cells enlarge and eventually become filled with 



