172 



mined as a new species and the name P. trichotoma given to it 

 by Mr. Massee. It is figured and described, as are also Heteros- 

 poriiim ColocasicB and Cephalosporiiint acreiHoninm. The last 

 mentioned species flourish upon the parts of the plant already at- 

 tacked by the Peroiiospora, They are frequently connected with 

 the disease, but are not considered as in any way the cause of it. 

 Contributions to the Life Histories of Plants, No. IV. Thos. 



Meehan. (Reprinted from the Proc. Acad. Nat. Sci. Phil., 



March 26, 1889). 



The author treats of " Secund Inflorescence/' ''Notes on 

 Pimis pungens and its Allies '' — which species is said to be scat- 

 tered across the entire State of Pennsylvania along the Alle- 

 ghanies — '* Corydalis flavula, DC./' *' Dimorphism in Polygo- 

 neae/' ** The Nature and Office of Stipules/^ and '' Euonymiis 

 Japonic a y 

 Cordia Greggiiy var. Palmeri, (Garden and Forest, ii. 233, n 



g" 



106). 

 Description of a Problematic Organism from the Devonian at the 



Falls of the Ohio. F. H. Knowlton. (Am. Journ. Sci., 



xxxvii. 202-209, illustrated, reprinted). 



The organism is provisionally named CalcisphcEra Lentonty 

 and it is an open question whether the animal or vegetable king- 

 dom will ultimately claim it. It closely resembles the fruit of 



Chara. 



Desert in June, — The. (West Am, Sci. vi. 21-26). 



Contains lists of plants from several localities in the Colorado 

 Desert. 

 Desmids : Their Life History and Their Classification. — H 



Fred'k. B. Carter. (Am. Month. Mic. Journ. x. 7^-79)' 

 Diatoms and Oscillaria — Motions of certain, Wm, A. Terry. 



(Am. Month. Mic. Journ. x. 81-83). 

 Diatoms of Mobile, Alabama.— Y^^, IM Cunningham, (The Mi- 

 croscope, ix. 105-108)- 



Contains a list of 137 species and varieties. 

 Flora of Custer County, Colorado. — Notes on the. — /// T. D. A. 



Cockerel]. (West Am. Sci. vi. 10-12). 

 Food of Plants— The. D. P. Penhallow. (Can. Rec. Sci. iii- 



333-353)' 



