﻿BOTANICAL GAZETTE 



3. A distinct phylogenetic series is seen in advance from con- 

 tinuous patches of hairs and reproductive bodies, to scattered 

 sori, to scattered conceptacles, and finally to apically placed 

 conceptacles or to conceptacles on specially developed side branches. 

 All of these structures originate through modification of the super- 

 ficial layer of the thallus. 



Acknowledgment is due to Professors Coulter and Chamber- 

 lain for their many helpful criticisms throughout the progress of 



LITERATURE CITED 



1. Agardh, C, Species Algarum. 1. Gryph. 1823-1828. 



2. Agardh, J. G., Species, genera, et ordines Algarum. 1. London. 1848. 



3. Barton, E. S., A systematic and structural account of the genus Turbi- 



naria. Trans. Linn. Soc. London II Bot. 3:215-226. ph. 14, 15- 1891- 



4. , On the structure and development of S or anther a. Jour. Linn. 



Soc. Bot. 33:479-486. ph. 23, 24. 1898. 



5- — — , On the fruit of Chnoospora jastigiata. Jour. Linn. Soc. Bot. 33: 



6. Bower, F. O., On the development of the conceptacle in the Fucaceae. 



7. I Ai.ki Mu kg. P.. Die Algen im^eitesten Sinne. Schenk's Handbuch der 

 Botanik 2:159-314. Breslau. 1912. 



8. Farlow, W. G., List of marine algae of the U.S. Proc. Amer. Acad. 



the Fucaceae; their life history and cytology. Phil. Trans. Roy. Soc. 

 London B 190:623-645. ph. 19-24. 1898. 



10. Greville, R. K., Algae britannicae. Edinburgh. 1830. 



11. Holtz, F. L., Observations on Pelvetia. Minn. Bot. Studies 3:23-45- 

 ph. 7 -i2. 1903. 



12. Kjellman, in Exgler und Praxtl, Die natiirlichen Pflanzenfamilien i*: 



13. Kutzing, F. T., Phycologia generalis. Leipzig. 1843. 



14. Leitgeb, H., Untersuchungen iiber die Lebermoose, Heft IV. Die 

 Ricieen. ph. /-p. 1879. 



15. Luerssen, C., Handbuch der Syst. Bot. 1:1879. 



53-56. pi. 14. 1893- 



