606 SUMMARY OF CURRENT RESEARCHES RELATING TO 



buds on Hy^msea valentise ; and they remark on the frequent occurrence 

 in Florideffi of tetragonidia on the same plant and even on the same 

 branch as the sexual organs. This phenomenon has been regarded as 

 abnormal by Yamanouchi, but the authors have found it of such fre- 

 quent occurrence in the Isle of Man that they feel this view is hardly 

 justified. A cytological examination would throw light on this point. 



Fungus-galls on Cystoseira and Halidrys.* — L. M. Estee describes 

 fungus-galls which occur on Cystoseira osmundacea and Halidrys dioica 

 Gardner. They appear near the bases of the bladders, seldom growing 

 on the solid main th alius. They arise first as a small dark brown spot, 

 which soon becomes wart-like, and then lengthens into finger-like pro- 

 jections with slightly enlarged tips. The author describes the galls and 

 the parasitic fungus which causes them, and compares the galls with 

 those previously recorded on algas. He discusses the structure and 

 systematic position of the fungus in question, Guignardia irritans. 



Norwegian Brown AlgsB-f — E. Norum's account of the brown 

 alg£e of the Haugesund district is published by N. Wille with a bio- 

 grapical notice of the author, who died in 1908. Eighty-four species 

 are enumerated, among them being Phycocmlis Alanse^ a new species of 

 Myrionematacea3 that grows epiphytically on Alaria esctdenta, forming a 

 strong plexus of filaments in its cortex and emitting fertile filaments 

 that bear long uniseriate gametangia. The plant is described, figured, 

 and critically discussed. 



New Fucacese.J — N. L. Gardner gives an account of new Fucacete 

 briefly described in a previous paper, together with certain other new 

 forms recently found on the coast of California, a few notes on some 

 related species, and, finally, a new species of Blossevillea from Guadelupe 

 Island, off the coast of Lower California. Two of the new species have 

 been distributed in the Phycotheca Bor. Amer. of Collins, Holden, and 

 Setchell. Good figures are given of the algae here discussed. 



Fungi. 

 (By A. LoRRAiN Smith, F.L.S.) 



Zygospore-formation in Phycomyces nitens.§ — ^ P. Lindner and 

 Glaubitz record an instance of the apparent degeneration of Phycomyces 

 nitens. Zygospores had been formed freely on the boundary line between 

 the + and - races. When the culture was repeated only sporangia 

 were formed, and the power to form zygospores was not recaptured by 

 the fungus. The reason for this was not apparent, but may possibly 

 have been due to long retention in a cool chamber. 



* Univ. California Publ. (Bot.) iv. (1913) pp. 305-16 (1 pi.). 

 t Nyt Mag. f. Naturvidensk. Christiania, li. (1913) pp 131-60 (1 pi.), 

 X Univ. California Publications (Bot.) iv. (1913) pp. 317-74 (18 pis.). 

 § Ber. Deutsch. Bot. GeselL, xxxi. (1913) pp. 316-18. 



