20 Thirty-eighth Annual Report of the 



Dr. Wilh. Blasius, Naumburg, 1884; also two pamphlets: " Spermo- 

 philus rufescens " and " Alca impeiinis" 



Annual Report .City Auditor, Boston, 1883 and 1884. 



The Canadian Record of Science, Vol. 1, No. 1, Montreal, 1884. 



Scientific Proceedings of the Ohio Mechanics' Institute, vol. II, No. 

 3, September, 1883. 



Smithsonian (Regents) Report for 1881. 



Report of Commissioner of Education, 1882 and 1883. 



Contributions to the Geological History of the American Continent ; 

 the address of the retiring President, delivered before the first Mon- 

 treal meeting of the American Association for the Advancement of 

 Science, August, 1857, by James Hall. Salem, 1882, 8°, 42 pp., from 

 the author. 



Eurypteridae from the Devonian and Carboniferous Formations of 

 Pennsylvania, by James Hall. Harrisburg, 1884, 8°, 18 pp. and 6 

 plates, from the author. 



Ceratiocaridae from the Chemung and Waverly groups of Pennsylva- 

 nia, by C E. Beecher. Harrisburg, 1884, 8°, 22 pp. and 2 plates, from 

 the author. 



Notes on a Nevada Shell (Pyrgula Nevadensis), by R. E. Call and 

 C E. Beecher. Philadelphia, 1884, 8°, 5 pp., 1 plate, from the authors. 



By purchase : 



Photo-micrographs and how to make them, by George M. Sternberg. 

 Boston, 1884, 8°, 204 pp., 19 plates. 



Das Gebiss der Schnecken zur Begriindung einer naturlichen Classifi- 

 cation, untersucht von Dr. F. H. Troschel. Erster Band, Berlin, 1856- 

 1863, 4to, 252 pp., 20 plates. 



Zweiter Band, Berlin, 1 866-1879, 4 , 246 pp., 24 plates. 



Desmids af the United States and list of American Pediastrums, by 

 the Rev. Francis Wolle. Bethlehem, Pa., 8°, 168 pp., 53 colored plates. 



Science, vol. 2, Nos. 46 and 47 ; vol. 3, Nos. 48 and 49, 51 and 52 

 to 57, inclusive, Nos. 58, 59, 60,^61, 62, 6^, 64, 65, 66, 67, 68, 69, 70, 

 71, 72, 73 ; vol. 4, Nos. 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 

 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97. 



American Naturalist, January, vol. XVIII, No. 1 ; February, No. 2 ; 

 March, No. 3 ; April, No. 4 , May, No. 5 ; June, No. 6 ; July, No. 7 ; 

 August, No. 8 ; September, No. 9 ; October, No. 10 ; November, No. 

 11; December, No. 12. 



American Journal of Science, No. 157, vol. 27, January; No. 158, 

 vol. 27, February; No. 159, March; No. 160, April; No. 161, May; 

 No. 162, June; No. 163, July; No. 164, August; No. 165, September; 

 No. 166, October; No. 168, December. 



Nature, vol. 30, Nos. 6, 7, 8, 9, 10, n, 12, 13, 14, 15, 16, 17, 18, 19, 

 21, 23, 24, 25, 27 ; vol. 31, Nos. 1, 2, 3. 



Encyclopaedia Britannica, vol. 17. 



Les Champignons de France, par G. C. Gillet, Texte, 1 col.; Atlas, 1 

 vol. Tableaux Analytiques des Hymenomycetes, par G. C. Gillet, 1 

 vol. Les Hymenomycetes, par G. C. Gillet Planches supplementaries 

 1-9 series. 



