292 



Hemitrichia clavata Rost. 



Hemitrichia intorta Lister. 



Hemitrichia Karstenii Lister. 



Hemitrichia stipata Mass. 

 Order II. Arcyriaceae. 



37. Ai-cyria pucinea Pers. 



Arcyria stipata List. 



Arcyria digitata McBr. 



Arcyria albida Pers. 



Arcyria incarnata Pers. 



Arcyria nutans (Bull.) Grev. 



Arcyria ferruginea Sant. 



Arcyria flava Pers. 



Arcyria insignis Kalchbr. and Cooke. 

 39. Perichaena variabilis Rost. 



Perichaena chrysosperma List. 

 Order III. Margaritaceae. 



41. Dianema depressum List. 

 Order IV. Lycogalaceae. 



43. Lycogala miniatum Pers. 



Lycogala exigium Morg. 



Lycogala flavo fuscum Rost. 



A Study or the Histology of the "Wood of Certain Species 



OF Pines. 



Katherine E. Golden. 



The conifers grow in thicl<ness similarly to the dicotyledons, but their 

 wood differs very considerably, particularly the secondary wood, in which 

 wood vessels are entirely absent. In the first-year wood a few vessels are 

 developed close to the pith, but the after-growth is composed entirely of 

 tracheides. The tracheides are fibre-lili;e elements with peculiar bordered 

 pits, and are very similar in their appearance in the different species, and 

 yet the wood, talven as a whole, differs very materially, varying from the 

 very soft, light wood of the white pine to the hard, dense wood of the 

 long-leaf pine. 



