xiv LIST OF PRINCIPAL AUTHORITIES QUOTED 



GUPPY, H. B. (continued}. 



" River-Temperature," part iii., Proceedings of the Royal Physical 

 Society of Edinburgh, 1896. (The first two parts deal principally with the 

 temperature of ponds and rivers, whilst in the last part the thermal 

 conditions are discussed especially in connection with the life of aquatic 

 plants.) 



" On the Postponement of the Germination of the Seeds of Aquatic 

 Plants," Proceedings of the Royal Physical Society of Edinburgh, 1897. 



".On the Temperature of Springs as especially illustrated by the Wandle 

 and other Tributaries of the Thames." (This paper, of which I have no copy, 

 was published in the Journal of the Royal Meteorological Society, about 

 1895. It throws light on the thermal conditions of plants in springs.) 



" Water- Plants and their Ways," Science Gossip, Sept., Oct., Nov., 1894. 

 (The various modes of dispersal of land as well as water plants are here 

 dealt with, their thermal conditions are discussed, and in the November 

 number are given the results of four years' observations on the life-history 

 and life-conditions of Ceratophyllum demersum.) 



" Caddis- Worms and Duckweed," Science Gossip, March, 1895. (A short 

 note.) 



" Stations of Plants and Buoyancy of Seeds," Science Gossip, April and 

 May, 1895. 



"Irregularity of some Cotyledons," Science Gossip, September, 1895. 

 " Plants of the Black Pond, Oxshott," Science Gossip, October, 1895. 



" On the Habits of Lemna minor, L. gibba, and L. polyrrhiza," Journal of 

 the Linnean Society, Botany, vol. xxx. (This paper contains the results of 

 three years' systematic observations of these plants.) 



"The Distribution of Aquatic Plants and Animals," The Scottish 

 Geographical Magazine, January, 1893. 



HEMSLEY, W. B., "Report on the Botany of the Challenger Expedition," 1885. 



"The Flora of the Tonga Islands," Journal of the Linnean Society,, 

 Botany, vol. xxx. 



HILLEBRAND, W., "Flora of the Hawaiian Islands," Heidelberg, 1888. 

 HORNE, J., "A Year in Fiji," London, 1881. 



KOLPIN RAVN, F., " Om Flydeevnen hos Froene af vore Vand-og Sump- 

 planter," Botanisk Tidsskrift, 19 bind., 2 hefte, Kjobenhavn, 1894 (" On the* 

 Floating Capacity of the Seeds of Aquatic and Marsh Plants "). (A resume" 

 in French is appended to the paper.) 



MARTINS, CH., "Experiences sur la Persistance de la Vitalite des Graines 

 flottant a la Surface de la Mer," Bull. Soc. Botanique de France tome iv., . 

 1857. 



