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554. Gregory, Emily L. Abnormal Growth of Spirogyra 

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555. . What are Diatoms? Pop. Sci. Mo. 41:200-205. 



/. 1-8. Jel892. 



556. Gregory, W. On the Presence of Diatomaceae, 

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 1856. 



Soils were examined from the Andes, Brazil, North America, West 

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557. Greville, R. K. Description of some New Diatomaceous 

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 pi. 3. 1857. 



558. . Descriptions of Diatomaceae observed in 



Californian Guano. Quart. Jour. Mic. Sci. 7:155-166. pi. 7, 8 

 1859.— (Edinb. New Phil. Jour. 10:25-30. 1859.)— (Trans. 

 Edinb. Bot. Soc. 6:245-249. 1860.) 



559. . On the Asterolamprae of the Barbadoes De- 

 posit. Trans. Roy. Mic. Soc. 10:41-55. pi. 7,8. 1862. 



560. . Descriptions of New Genera and Species of 



Diatoms from the South Pacific. Trans. Edinb. Bot. Soc. 7 : 

 534-543. 574-580. 1863.— (Edinb. New Phil. Jour. 18:35-43. 

 181-187. 1863.) 



561. . Descriptions of new and rare Diatoms from 



the Tropics and Southern Hemisphere. Trans. Edinb. Bot. 

 Soc. 8:436-441. 1866.— (Trans. Mic. Soc. 11:8. 1 pi. 12:81- 

 94. 1864. 13:1-10. 24-34.43-75.97-105. 1865.14:1-9. 77- 

 86. 121-130. 1866.) 



562. Grey, E. Glycerin in Mounting. Am. Mo. Mic. Jour. 

 5:140. 1884.— (Zeits. wiss. Mik. 2:81. 1885.) 



563. Griffen, A. K. An Essay on the Botanical, Chemical 

 and Medical properties of the Pucus edulis of Linnaeus. Van 

 Winkle and Wiley. 8vo. 1-36. pi. 1. 1816. New York. 



564. Griffin, A. W. On the Collection and Preparation of 

 the Diatomaceae. Jour. Mic. Nat. Sci.: Jour. Post. Mic. Soc. 

 3:138-146. Jl. 3:229-236. 01884.— (Am. Mo. Mic. Jour. 6:6-8. 

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Much use made of American material. 



565. Griffith, E. H. Diatoms: How to Find and How to 

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