Marine Algae. 



Two thousand herbarium specimens of Marine Algse, representing about four hundred 

 species, American and foreign, all named and in good condition, some very fine; will be 

 sold at a low price, as a whole, or in larger or smaller lots to suit. 



Address FRANK S. COLLINS, 



Maiden, Mass. 



Plaats from the Cascade Mountains. 



The undersigned has new sets of Washington plants. The larger number of species 

 are both in fruit and flowers. Some are new. Full sets sold at the rate of S8 per hundred. 

 Desiderata, 10 and 15 cents each, according to the number selected. fi®*Send for lists. 



W. N. SUKSDORF, 



6t White Salmon, W. T. 



BOTANIOAL IE 3 .A. :P IE IR, - 



e. morrTson. 



papee waeehouse, 



No. 805 D Street, Washington, D. C. 



Standard Herbarium Paper, 21 and 30 lbs., at 14.50 and $6.00 per ream. Genus Covers, 

 standard size (16% by 24), and weight, best quality, at 2 to 5 cents a piece. Drying paper 

 always kept on hand. Can furnish any size or weight. 



FOR SALE OR EXCHANGE. 



American Naturalist, Vols. XII. and XIII. (1878-9), bound, one- 

 half leather, each #3.00 



" " Vol. XIV., unbound 2.00 



" " Single numbers (Feb., 1880, Jan. and Feb., 



1881), each 10 



American Journal of Microscopy, Vol. IV., V., VI. (1879 81), 



unbound, each 5° 



American Monthly Microscopical Journal, Vol. I. (1880), 



unbound 75 



The above periodicals are in first-class condition. • Address, 



C. R. BARNES, Lafayette, Iiicl. 



FUIX SETS OF "THE LENS." 



The State Microscopical Society of Illinois offers a few complete sets of The Lens, pub- 

 lished under its auspices in 1872-3, for S3. 14, being one-half the former price plus the post- 

 age. It contains, among much other valuable matter, the following original papers : Con- 

 spectus of Families and Genera of Diatomaeese, by Prof. H. L. Smith ; Flora of Chicago, 

 Prof. H. H. Babcock; Microscopical Memoranda for Use of Medical Practitioners, Dr. J. J. 

 Woodward; Algse Rhodiacese, S. T. Olney ; Causes of Influenza in Horses, Prof. James 

 Law ; Preparation of Diatomaeese, Dr. Christopher Johnson ; Diatomacete of the Baltic, S . 

 A. Briggs; and many others equally important. 



Address WH. H. SUMMERS, 



Treas. S. Micr. Soc. 111., 

 3450 Cottage Grove Ave., Chicago, 111. 



