s advertised by A. J. Doherty in the Journals from January to April, 1887, may be sentthrough the Business Manager, P. O. Box 630, Washington, D. C. A few copies of Leidys Fresh-Water Rhizopods, of North America, can still be had at $5 00 per copy.—PO. Box 630, Washington, D. C. Remittances should… … FRESH-WATER POLYZOA. THE AMERICAN MONTHLY MICROSCOPICAL JOURNAL. Vol. IX. JUNE, 1888. No. 6. Analytical Key to the Fresh-water Polyzoa.* The Polyzoa are so plentiful in our ponds and slow streams, and so ex-quisitely beautiful, that those who are loyers of nature, although not profes-sional…
Microscopy
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