168 EEYTHEA. 



6. Hauptfleisch, P. Die Frachtentwickelung der Gat- 

 tangen Ohylocladia, Champia und Lomentaria. Flora, Bd. 

 75 ; pp. 307-367, Ta£. 7-8, 1892. 



7. BulFham, T. H. On the Reproductive Organs, espe- 

 cially the Antheridia, of some of the Floride^e., Jour. Quekett 

 Mic. Club, Ser. II, Vol. IV; pp. 246-253. PI. XV, XVI. 1890. 

 On the Antheridia, etc. of some Floridese. Ibid. Ser. II, Vol. 

 V; pp. 291-305, PI. XIII, XIV. 1893. 



8. Davis, B. M. The Development of the Cystocarp in 

 Champia parvula. Botanical Gazette, Vol. XXI ; p. Ill, pi. 

 VII. figs. 1 and 2. March, 1896. 



9. Osterhout, W. J. V. A simple freezing device. Botan- 

 ical Gazette, Vol. XXI ; p. 195. April, .1896. 



EXPLANATION OF PLATE. 



Figs. 1-4 are drawn with the aid of the Abbe Camera from 

 microtome sections. 



Fig. 5 is drawn from formalin material, crushed on slide. 



The letters indicate the various cells as follows; — p, peri- 

 pheral-cells; s, stalk-cells; f, filament-cells; a, antheridial 

 mother-cells. 



Fig. 1, X 240. Figs. 2—5, x 750. 



BOTANICAL REMINISCENCES OF SAN 



FRANCISCO. 



By H. H. Behr, M. D. 



History has preserved for us the general features of the 

 secular changes in the flora of some countries but without 

 enabling us to distinguish between the mild work of nature 

 producing gradual changes and the violent impetuous work 

 of man subjecting nature to serve his purposes — what we 

 call civilization. 



While in former times, and even novv in barbarous 

 countries, most of the changes in vegetation were preceded 



