376 MINNESOTA BOTANICAL STUDIES. 



1011. Peck, C. H. Reports of State Botanist of New York. 

 (1869.) 51.— (Grevillea. 1:14. J11872.) 



New American Polysiphonia. 



1012. Pell, R. L. Sea- weed as a Manure. Am. Inst. Trans. 

 320-326. 1860-61. 



1013. Pelletan, J. Bibliographie des Diatomees par M. P. 

 Habirshaw. Jour. Microg. 3:4:5: 1879-1881. 



1014. . Diatomacees. Mission Scietifiqua du Oip 



Horn. Jour. Microg. 12:354. 1888. 



1015. Penhallow, D. P. Notes on Devonian Plants. Trans- 

 Roy. Soc. Can. 1^:19-30. pi. 1,2. 1889.— (Can. Rec. Sci. 

 3:430-432. J11889.)— (Jour. Roy. Mic. Soc. 1890:366. Jel890.) 



Gives a complete revision of the genus Nematophyton. Five species 

 are probably the entire number in the genus. 



Penhallow, D. P. See Dawson, W. and Penhallow, 

 D. P. 



1016. Perry, G. W. Arthrocladia villosa Duby. Bull. Torr. 

 Bot. Club. 10:106. S1883. 



1017. Peters, J. E. Arthrocladia villosa Duby. Bull. Torr. 

 Bot. Club. 12:62. Jel885. 



1018. Peticolas, C. L. The Richmond Diatomaceous Earth. 

 Am. Jour. Mic. 2:17, 18. F1877.— (Cin. Med. News. Agl878.) 

 —(Mo. Mic. Jour. 17:294. lJel877.) 



1019. . Diatoms. New York Tablet. 18Myl878. 



1020. . Some New Slides from the Richmond, Vir- 

 ginia, Diatomaceous Earth. Am. Jour. Mic. 5 : 133, 134. 

 Jel880. 



Fifty-two species of diatoms listed. 



1021. . Diatoms. Leonard's Med. Jour, 01883. 



1022. . New Slides of Diatoms. Am. Mo. Mic. Jour. 



4:234. D1883. 



1023. . New Diatoms from the Maryland Artesian 



Wells, the most Interesting and Beautiful found since the 

 Discovery of the Celebrated Santa Monica Earth, with Notes on 

 New Deposits. 1885. Richmond, Va. 



1024. . Two New Preparations of Richmond Diatoms. 



Mic. Bull. F1885. 



1025. . Notes on the Diatomaceous Formations of 



Virginia in Connection with some Recent Discoveries made in 

 the Excavation of the Eighth Street Tunnel at Richmond. The 

 Microscope. 8:327-330. N1888.—(BulJ. Torr. Bot. Club. 16:32. 

 12Jal889. ) 



