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VEGETATIVE STRUCTURE OF MESOGLOIA. 



BY A. C. LIFE. 



As very little work has been done upon the vegetative 

 structure of Mesogloia divaricata, it seemed an inviting 

 field for investigation, and accordingly work was begun 

 upon it at Wood's Hole, Mass., at the Biological Station, 

 in the summer of 1904. 



This work has been continued in the Shaw School of 



Botany of Washington University. 



Previous work has been done mainly by Reinke and 

 Henckel. Reinke*, in 1881, worked out some points of 

 the structure of what he called Chordaria divaricate, 

 which Farlowf states is the Mesogloia of the New England 

 coast. Engler and Prantl } describe the genus Mesogloia, 

 but are not definite in the description of its structure. 



Henckel § in 1903 published an account of both Chor- 

 daria flagelliformis and C. divaricata in connection with 

 Cystoclonium. His conclusions are different from those of 

 Eeinke, concerning the method of growth. 



The Mesogloia divaricata which was studied in this work 

 was collected at Wood's Hole, Mass., during the early part 

 of August, 1904. It was obtained from water one to 

 two feet in depth at low tide, where it grew attached to 

 rocks and the silty bottom. 



The material was fixed in a weak chromo-acetic acid 

 solution in sea water. It was allowed to remain in the 



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J. Reinke, Atlas deutscher Meeresalgen. 2: 57. pi. 30. (1889). 

 f Marine algae of New England. (Report U. S. Fish Commission. 



1879:84.) 



X Die Naturlichen Pflanzen-Familien. Teil I. Abteilung 2. p. 229. 



§ Sur l'anatomie et la biologie des algues marines. (Scripta Botan^ 



) 



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