■•177 



seems not to be definitely stated by the author. Presumably, 

 however, the implication of incompleteness in the modest title 

 is a sufficient explanation of the absence of the eucalyptus and 

 certain others. 



Harriet L. Wilson's paper on " Gracilariophila, a new parasite 

 on Gracilaria confervoides " describes the structure and develop- 

 ment of a small red alga that is parasitic on a larger red alga 

 to which it appears to be closely related. The parasite forms 

 on the surface of the Gracilaria colorless tubercles resembling 

 adherent particles of sand or small grains of rice. Three sorts 

 of tubercles, antheridial, cystocarpic, and tetrasporic, distin- 

 guishable from each other only under the microscope, occur. 

 Rhizoidal processes penetrate the host plant and evidently serve 

 not only for attachment but for drawing nourishment from the 

 host. The parasite is described as Gracilariophila oryzoides 

 Setchell & Wilson, new genus and species, and is referred to the 

 same suborder to which its host belongs. 



In "Plantae Mexicanae Purpusianae, II," Mr. T. S. Brandegee 

 describes twenty-two new species of spermatophytes, nearly all 

 collected by Dr. C. A. Purpus in the state of Puebla, near 

 the boundary line of Oaxaca, Mexico. One of the species repre- 

 sents a new genus, Amphorella, of the Asclepiadaceae. 



Dr. N. L. Gardner, in his paper on " Lettvenia, a new genus of 

 flagellates," describes and figures in much detail the structure 

 and development of a curious microscopic fresh-water organism, 

 the affinities of which are uncertain. Specimens of the organism 

 had been distributed in the Phycotheca Boreali-Americana under 

 the name Osterhoutia natans, but, learning that the name Oster- 

 houtia had been previously given to a genus of spermatophytes. 

 Dr. Gardner avails himself of another one of Professor W. J. 

 Van Leuven Osterhout's names in coining the substitute generic 

 name Leuvenia. 



Professor Setchell, as would appear from his paper on "The 

 genus Sphaerosoma,'' was led by a study of a Calif ornian as- 

 comycetous fungus, at first supposed to be an undescribed species 

 of Sphaerosoma, to a critical review of the pertinent literature 

 and the available specimens referred to this genus. Among his 



