Il mensile americano microscopiche ufficiale . s pubblicizzati da A. J. Doherty in riviste da gennaio ad aprile 1887, può essere sentthrough il Business Manager, P. O. Box 630, Washington, D. C. un paio di copie di Leidys Fresh-Water Rhizopods, del Nord America, può ancora essere avuto a soli 5 dollari 00 per copia.-PO. Box 630, Washington, D. C. rimesse dovrebbe essere rEade tramite vaglia postale, vaglia, o mediante il denaro inviato in lettere registrati. Draftsshould essere intestato a Washington, New York, Boston, Filadelfia, all'ordine del Manager. Il primo volume, ho88o, è interamente fuori stampa. Il successo vol

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The American monthly microscopical journal . 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 be rEade by postal notes, money orders, or by money sent in registered letters. Draftsshould be made payable in Washington, New York, Boston, or Philadelphia, to the order of the Manager. The first volume, i88o, is entirely out of print. The succeeding volumes will be sent by the publisher forthe following prices which are net :—Vol. II (1S81) complete, Ji so; Vol. Ill (1882), out of print; Vol. IV(1883) complete, Ji.so; Vol. V (1884) complete, Ji.so ; Vol. V (1884), Nos. 2-12, $1.00 ; Vol. VI (1885), $1.50;Vol. VII (1886), $1.00; Vol. VIII (1887), $1.00. As calls for Volume I sometimes occur, those persons havingcopies to dispose of would do well to inform us, and to state their prices.. 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 naturalists, should be more familiar with them than the majority ofsuch people seem to be. The amateur microscopist. or the adyanced oneindeed, can find no more attractiye field for investigation than that occupiedby the fresh-water Polyzoa. They abound almost eyerywhere in our pondsand lakes. They encrust the lower surfaces of the stones, the floating log, thelily stems ; they cling to the rootlets of Lcmtia^ and even form huge, slightlyadherent, or often floating, inasses of jelly, into which the charming animalsretreat at the least alarm, and from which they spread their lovely plumeswhen they feel that all is well. They are, therefore, easih obtained

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1880
• booksubjectmicroscopy
• bookyear1