47 



NEW OR RARE MICROFUNGI. 



By A. Lorrain Smith F.L.S., and J. Rcuusbotlom M.A., 



F.L.S. 



Mr. Ramsbottom's departure for Salonika to assist in the 

 military hospitals has prevented him from joining in the 

 linal revision of these pages for the press. As in previous 

 years we have to thank Mr. D. A. Boyd for the very valuable 

 material he has sent. The new genus of Discomycetes, 

 Discoccra, was discovered by W. Watson while collecting 

 lichens. Our special thanks are due to him for sending us 

 such an interesting plant. 



PHYCOMYCETES. 



Rhizophidium acufofme (Zopf) Fisch. Rabenh. Krvpt. Fl. 

 I. 4, p. 93, 1892. 



Sporangia of the host cell sometimes seated on stalks, 

 often crowded in groups of i-io, globose or lemon-shaped 

 6-i6m diam., with a short apical papilla, and at the base, a 

 slender branched minute rhizoid. Zoospores minute, 2/x in 

 diam., globose, with minute oil-drops and one cilium. 

 Resting spores smaller than the sporangia, globose, with 

 a large oil-drop almost filling the cells. 



On Chhimydomonas intermedia in a cart-rut at Harborne, 

 April 191 7. Coll. W. B. Grove. (New Phvtologist xvi. 

 pp. 177-80 (i fig.) 191 7). 



PYRENOMYCETES. 



Melanospora laf^enaria Fuck. 



Already recorded for Britain (Trans ii. p. 93, 1905). It 

 has been found by D. A. Boyd at Eglinton, Ayrshire, Aug. 

 191 7. The perithecia are mostlv in groups; the spores are 

 slightly larger than the size given, measuring about 16x7/*. 

 It grew on Polystictus versicolor along with Hypomyces 

 auranlius. 



Chaelomium pannosun) Wallr. Flora Crvpt. Germ. 11. p. 

 267, 1833. 

 Perithecia solitary or generally in crowded groups, 

 ellipsoid, up to 0.5 mm. high, 0.3-4 "i"""- tbick, with a short 



