144 THE AMERICAN MONTHLY. [June! 



Star-Fish. — Dorsal and ventral mounts. Prepared by J. D. King, 



Edgartown, Mass. 



Amphipleura pellucida. — Dr. John Sloan, New Albany, Ind. 



SUBSCRIBERS' NOTICES. 



[These notices will be given six insertions in this column at 25 cents per line or fraction thereof.] 

 FOR EXCHANGE.— Slides of selected diatoms. D. B. WARD, Poughkeepsie, N. Y. 



WANTED — Unmounted microscopical material, also micrographic dictionary. Will exchange or 

 buy. CHARLES VON EIFF, 124 Clinton Place, New York City. 



WANTED — A clean copy of Rev. William Smith's British Diatoms, and Schmidt's Atlas of the 

 Diatomacese. JAMES B. SHEARER, Bay City, Mich. 



OFFERED. — Diatomaceous Earth from Utah (Desert) for Histological Mounts. 



PROF. ORSON HOWARD, Salt Lake City, Utah. 



CORRESPONDENCE invited with a view to the exchange of either mounted or unmounted Oribatida 

 (British) for American species. E. BOSTOCK, Stone, Staffordshire. 



WANTED. — Specimens of rocks for slicing and grinding into sections ; also bones and teeth of differ- 

 ent animals, diaton-s iusitu on algse, diatomaceous and polycistinous earths, ocean soundings, etc., etc. 

 Liberal exchange in microscopic slides or cash. 



ARTHUR J. DOHERTY, 63 Burlington St., Manchester, Eng. ' 



TO EXCHANGE. — Native gold, silver, copper, lead, zinc, and other beautiful cabinet specimens, 

 polished ornaments and sections of p. trifled wood — Chalcedony — and native turquoise, agate, amethyst, 

 rubies, etc.; also Indian ornaments, curios, arrows, blankets, pottery, etc.; pelts of wild animals, species 

 of native cactus, and a good second-hand " Burt's Solar Compass " complete. Any or all of the above 

 are offered in exchange for new, or good second-hand, objectives, condensers, polarizers, stand, or other 

 microscopical apparatus. W. N. SHERMAN, M. D., Kingman, Arizona. 



OFFERED. — Zeiss' New Catalogue (in German) forwarded tor 10 cents in stamps. 



F. J. EMMERICH & SONS, 43 Barclay St., New York City. 



FOR SALE. — Preparations of Diatoms, the work of I. D. Moller, at 10 cents per slide. 



E. A. SCHULTZE, Box 56, New York City. 



OFFERED. — Diatomaceous earth from Thibet, various localities (12,000 feet); also, material and 

 slides of diatoms from Scottish Highlands, and continental foraminiferae. WANTED. — Slides of 

 American diatoms, insects, or botany. 



W. D. STEWART, 2 Gilmore Terrace, Edinburgh, Scotland. 



OFFERED. — Sections of vegetable ivory and slides of crystalized maple sugar. Good mounts 

 aken in exchange. WM. LIGHTON, 106 Fifth Avenue, Leavenworth, Kansas. 



WANTED. — Parasites and books on Parasites and other micro, subjects. Will give Anatomical, 

 Pathological Botanical, Micro-fungi, Zoophytes, Polycistinae, Foraminiiera, Parasites, and other slides 

 in return. FRED. LEE CARTER, Gosforth, near Newcastle-on-Tyne, England. 



Wanted, Diatomaceous earth from Megillanes, Bolivia, South America. Can give in exchange 

 either Diatomaceous earth from New Zealand or cash. 



E. MICHALEK, I. Fleischemarkt, No. 1, Vienna, Austria. 



Mounted sections of Fcetal Lung (5 months), sections across entire lobe, j^ in. thick, beautifully 

 stained, in exchange for first-class pathological slides. 



W. C. BORDEN, M. D., U. S. A., Fort Douglas, Utah. 



Wanted, earths, recent diatoms, and miscellaneous objects for mounting. Only first-class material 

 offered or desired. MARY A. BOOTH, Longmeadow, Mass. 



Fossil Diatomaceous deposits (marine) wanted from Bermuda, Virginia, Maryland, California, etc. 

 I. ELLIOTT, Ardwyn Villa, Aberystwith, Wales, England. 



Labels for slides. EUGENE PINCKNEY, Dixon, 111. 



Correspondence relative to exchange in microscopical material or prepared mounts. 



HENRY L. OSBORN, Hamline, Minn. 



First-class Histological Slides for other good mounts ; Histological and Pathological material cut on 

 shares. S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 



FOR EXCHANGE. — Diatomaceous earth from Richmond, Va., Nottingham, & Calvert Co., Md., 

 Los Angeles and Santa Monica, Cal., for other diatomaceous material, crude or cleaned, recent or fossil 

 (marine forms preferred), or for diatom or miscellaneous slides (only good mounts wanted). 



F. W. DUNNING, 37 Garrison Ave., Battle Creek, Mich. 



WANTED. — A set of Proceedings of the American Society of Microscopists. State price of set or 

 of single volumes, kind of binding, etc. Also, any other microscopical periodicals. 



P. O. BOX 630, Washington, D. C. 



WANTED. — Any works on Microscopy not already in my Library. 



H. M. WHELPLEY, F. R. M. S., St. Louis, Mo. 



