Tilden: bibuography of American algae. 323 



342. Davidson, G. Diatoms.— (The Microscope. 9:311. 

 01889.)— (Am. Mo. Mic. Jour. 11:42. F1890.) 



A collection from Lopez Island in Washington Sound presented to the 

 San Francisco Microscopical Society Aug. 28, 1889. 



343. Davis, B. M. Continuity of the Protoplasm in the 

 Chantransia form of Batrachospermum. Bot. Gaz. 16: 149. If. 

 My]891.— (Jour. Roy. Mic. Soc. 1891:628 01891.) 



344. . Development of the Fi'ond of Champia parvula 



Harv. from the Carpospore. Ann. Bot. 6:339-354. jil. 21. 

 D1892.-(Zoe. 3:366. Jal893.)— (Jour. Roy. Mic. Soc. 1803: 

 361. Jel893.) 



345. . Euglenopsis: a New Alga-like Organism. 



Ann. Bot. 8: 377-390. 2^1- 10. 1894. 



Specimens from Charles River, Cambridge, Massachusetts. 



346. . Notes on the Life History of a Blue-Green 



Motile Cell. Bot. Gaz. 19: 96-102. 16Mrl894. 



347. Davis, J. E. Diatom Slide. — (Am. Mo. Mic. Jour. 

 8:137. J11887.) 



Specimens dredged from ocean bed at a depth of 1,750 fathoms, shown 

 at the meeting of the San Francisco Microscopical Society May 27, 



1887. 



348. ■ . Diatomaceous Earth. — (Am. Mo. Mic. Jour. 



11:195. Agl890.) 



Contributions to the San Francisco Microscopical Society July 23, 

 1890. Specimens from Los Angeles county. 



349. Dawson, G. M. On Foraminifera from the Gulf and 

 River St. Lawrence. Am. Jour. Sci. Arts. III. 1:204-210. 

 Mrl871. 



350. Dawson, J. W. Notice of the Natural History Collec- 

 tions of the McGill University. Can. Nat. Geol. 7:221-223. 

 Jel862. 



The herbarium contains a collection of Algae. 



351. . The evidence of Fossil Plants as to the Climate 



of the Post- pliocene period in Canada. Can. Nat. and Geol. 

 N. S. 3 : 69-76. F1866. 



Species of Fucus and Ulva are described but not determined. 



352. Dawson, J. W, and Hinde, G. J. On New Species of 

 Fossil Sponges from the Siluro- Cambrian at Little Metis on the 

 Lower St. Lawrence. Trans. Roy. Soc. Can. 7^:31-55. 1889. 



Buthotrephis pergracilis Dawson is described. 



353. Dawson, W. and Penhallow, D. P. On Nematophyton 

 and allied forms from the Devonian (Erian) of Gaspe and Bay 



