179 



very positive judgment in the matter until the facts in the case 

 are all known. 



The title of Ada Sara McFadden's paper "The nature of the 

 carpostomes in the cystocarp of Ahnfeldtia gigartinoides" gives 

 a fair idea of the subject matter of her brief dissertation. The 

 peculiar openings of the cystocarp of this marine red alga are 

 said to average as many as forty-two to a cystocarp. They are 

 possibly formed by decomposition. Incidentally, the author 

 sets forth the ample grounds for considering the Pacific American 

 Ahnfeldtia gigartinoides specifically distinct from Ahnfeldtia con- 

 cinna, originally described from Hawaii. 



In continuation of the notable studies of parasitic red algae 

 being made at the University of California, Mabel Efifie McFad- 

 den publishes as her thesis for the degree of master of science a 

 paper "On a Colacodasya from southern California." The paper 

 is devoted to describing and figuring Colacodasya verrucaeformis 

 W. A. Setchell and M. E. McFadden, sp. nov., parasitic? on 

 Mychodea episcopalis J. Ag. This parasite was first detected 

 by Professor W. G. Farlow, but the description is based on 

 abundant material collected later at San Pedro by Dr. N. L. 

 Gardner. 



Edna Juanita Hoffman, in her account of the "Fructification 

 of Macrocystis,'" describes the character of the fertile leaves and 

 the nature of the sori of Calif ornian and Peruvian specimens of 

 the Great Kelp — Macrocystis pyrifera. In Calif ornian plants the 

 sporangia occur on basal leaves differing from the upper leaves 

 in the absence of bladders or in the possession of a branching 

 blade. In Peruvian specimens collected by D. G. Fairchild in 

 1899, sori are found on leaves of about the ordinary type. In 

 neither do the reproductive bodies occur in "furrows," as de- 

 scribed in 1895 by Misses Smith and Whitting. 



The main results of the study of " Erythrophyllum delesserioides 

 J. Ag." by Mr. Wilfred Charles Twiss is that the plant belongs 

 among the Gigartinaceae, where originally placed by J. Agardh, 

 instead of among the Dumontiaceae to which it was doubtfully 

 referred by Schmitz in "Die natiirlichen Pflanzenfamilien " of 

 Engler and Prantl. Mr. Twiss thus confirms the opinion ex- 



