Class ification . 9 7 



columella stout, elongated, spores numerous ; branches 

 scattered, spirally recurved, usually terminated by 

 small globose sporangia (sporangiola) ; columella 

 minute ; spores few, resembling in size and form those 

 of the large terminal sporangium, colourless, elliptical, 

 7-9 X 5-6 p. 



Helicostyhim elecfans, Corda, Ic. Fung. pt. v. pp. 

 17 and 55, tab. ii. fig. 28; Cke. Hdbk. p. 936, hg. 

 408 ; Sacc. Syll. vii. n. 708. 



On various decaying organic substances. Rare. 



Forming minute whitish tufts, sporangiferous 

 hyphae \ — 1 in. high. Distinguished by the spirally 

 coiled branches ; but these are sometimes absent, when, 

 the simple stem with its terminal sporangium closely 

 resembles Mucor mucedo. 



Tlelicostylum nigricans, Yan Teigh. (figs. 18—21). 



Sporangiferous hyphee erect, branched, white, then 

 dusky, sporangium terminating the main stem, large, 

 globose ; columella ovoid ; branches verticillate, short, 

 slender, tips recurved, sporangiola spherical, columella 

 minute ; spores alike in the two forms of sporangia, 

 colourless, elliptical, 8-9 x 5-6. 



Helicostylum nigricans, Van Tiegh. Ann. Sci. 

 Nat. ser. vi. vol. iv. p. 374, pi. 13, figs. 79—83; 

 Sacc. Syll. vii. n. 711. 



On decaying organic matter. Rare. 



Forming minute tufts, at first white, then blackish, 

 sporangiferous hyphie up to 5 in. high. Distinguished 

 by the verticillate branches ; when the latter are ab- 

 sent, as is sometimes the case, the fungus is difficult to 

 separate from species of Mucor. The main hypha is 



H 



