320 MINNESOTA BOTANICAL STUDIES. 



299. Cox, J. D. Photography with high powers by lamp light. 

 Illustrating the Structure of Diatoms. Proc. Am. Soc. Mic. 

 7th Ann. Meeting. 99-104. pi 5. 1884. 



300. . Structure of the Diatom Shell. Silicious films 



♦ too thin to show a broken edge. Jour. Roy. Mic. Soc. II. 



5:398-405. (Je)1885. 



A number of specimens from the United States were mentioned. 



301. . Some Diatom Hoops: The Question of their 



Mode of Growth (Aulacodiscus kittoni.) Proc. Am. Soc. Mic. 

 8th Ann. Meeting. 33-37. 2 f. 1885.— (Jour. Roy. Mic. Soc. 

 II. 6:659. 660. Agl886.) 



302. . Diatoms of the Gulf. Am. Mo. Mic. Jour. 



6:145-147. Agl885. 



303. . Deformed Diatoms. Proc. Am. Soc. Mic. 



13th Ann. Meeting. 178. 1890. 



Abnormalities in 16 genera described. 



304. . The Coscinodisceae. Notes on some unreliable 



criteria of Genera and Species. Proc. Am. Soc. Mic. 13th Ann. 

 Meeting. 180. 1890. 



305. -. Diatoms: their Nutrition and Locomotion. 



The Microscope. 196-202. J11890. 



306. . Diatom Structure — The Inierpretation of Mi- 

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 Apl891. 



307. Cragiu, F. W. Note on Characeae. Bull. Washburn 

 Coll. Lab. Nat. Hist. 1 : 188. J11886. 



308. . On a leaf-bearing Terrane in the Loup Fork. 



Am. Geol. 8: 29-32. J11891. 



Contains list of diatoms found in a lacustrine marl deposit in Indian 

 Territory. 



809. Craig, T. A new Dictyosphaerium. Proc. Nat. Sci. 

 Ass. L 4: 10. Jal894. 



310. Croall, A. Marine Algae of Greenland. 68°-70° N. L. 

 Trans. Edinb. Bot. Soc. 9:456^62. 1868. 



311. Crotty, Gertrude. Methods of Collecting, Cleaning 

 and Mounting Diatoms. Trans. 23d Meeting Kansas Acad. Sci. 

 12:81-83. (1889.) 1890. 



312. Cuboni, G. Diatomee raccolte a San Bernardino dei 

 Grigioni da Giuseppe De Notaris. Notarisia. 2:226. 1887. 



313. Cunningham, K. M. Procuring and Cleaning Diatoma- 

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