PLATE V. 



Figures magnified 500 diameters. 



Figs. 1, 2. SYNEDRA CHASEI, Thomas ; W. and ., 1, p. 4, 2, f. 3. A var. 



of S. longissima, S. B. D., p. 72, 12, f. 95. 

 Fig. 3. AMPHIPRORA ELEGANS, Greg., T. M. S., 1857, p. 10, 1, f. 30; H. 



L. S., Lens, p. 73, No. 19, 1, f. 17. 



4. AMPHERA GIGAS, Ehrb. Mik., 6, 2, f. 13; H. L. S., Lens, p. 73, 



sub No. 22 ; p. 80, sub No. 45. 



5. SURIRELLA MISSISSIPPICA, Ehrb. Mik., 35, A. 8, f. 5 ; Missis- 



sippi. 

 " 6. ^ " LIVSOMA, Ehrb. Mik., 33, 14, f. 25, Connecticut, 



probably one of the plates of Rhabdoneina. 

 7. COCCONEIS GEMMATA, Esrb. Mik., 37, 3, 2, Oregon. 



Figs. 8, 9. COCCONEIS RHOMBIFERA, Bail, and Harv., p. 175, 9, f. 3, 4. 



California. 



Fig. 10. STJRIRELLA COCCONEIS, Ehrb. Mik., 35, A., 8, 3 ; a dubious form, 



not a Surirella, nor a Cocconeis. 



11. COCCONEIS, REGALJS, Grev., M. J., 1859, p. 156, 7, f. 1. Califor- 



nia guano. 



12. COCCONEIS SULCATA, Bail, and Harv., p. 175, 9, f. 5. 



" 13-15. AMPHIPRORA VITREA, S. B. D., Vol. I, p. 44, 31, f. 270; V. H., 



'2-2, f. 29, Mobile, Ala. 



16. DIMEREGRAMMA NOV^E C^ERARE^, (frustules attached) Kain 



and Schultze, Bot. Bull., Mar., 1889, Vol. XVI, 

 No. 3, artesian well, Atlantic City, N. J. 



17. FRAGILARIA FREMONTII, Ehrb. Abh., 1870, 56, 2, 1, f. 5, of 



doubtful value, probabl3 T a hoop of some dia- 

 tom, Salt Lake. 



18. SYNEDRA VALENS, Ehrb., Prit,, 782, 12, 44. 



lit. FRAGILARIA VENTER, Ehrb. Abh, 1869, 1, a Mexico. Probably 



merely a hoop of Odontidium. 

 " 20. FRAGILARIA NEWBERYI, Ehrb., 1870, 56, 3, 1, 12, Nevada. A 



doubtful form, may be a Biblarium. 

 21. FRAGILARIA INFLEXA, Ehrb., not a good specimen or species ; 



probably a hoop of Eunotia. 



'-2. DIMEREGRAMMA NOV^E C^SARE^;, K. and S., (frustules de- 

 tached), Typ. form to right, var. Obtusa to left, 

 Bot, Bull. Vol. XVI, No. 3, 1889, artesian well, 

 Atlantic City, N. J. 

 " 23. DIMEREGRAMMA FULVUM, Half's., V. H., 36, f. 7, 8. 



24. MASTOGLOEA APICULATA, S. B. D., II, p. 65, 62, f. 3, 87. 

 " 25. ENTOMOGASTER WOODWARDII, Ehrb. Abh., 1870, var. Califor- 

 nia. Probablv a form of Amphora. 



