. Ctenophores of the Atlantic coast of North America. Ctenophora -- Atlantic Coast; Ctenophora. CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA 31 1891 (Pfliiger's Archiv fiir Physiol., Bd. 50, p. 423), concludes that the apical sense-organ in Beroe does not subserve the sense of hearing, but controls the orientation and equilibration of the animal. Without the sense-organ the animal assumes unnatural positions in the water. I find that the effective stroke of the cilia of Bolinopsis viirea may sometimes be reversed by a solution composed of molecular (100 MgClj), so that t
. Ctenophores of the Atlantic coast of North America. Ctenophora -- Atlantic Coast; Ctenophora. CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA 31 1891 (Pfliiger's Archiv fiir Physiol., Bd. 50, p. 423), concludes that the apical sense-organ in Beroe does not subserve the sense of hearing, but controls the orientation and equilibration of the animal. Without the sense-organ the animal assumes unnatural positions in the water. I find that the effective stroke of the cilia of Bolinopsis viirea may sometimes be reversed by a solution composed of molecular (100 MgClj), so that the animal swims backward, •j.^., mouth-end forward. Mnemiopsis mccradyi Mayer. (Fig. 48, plate 8.) Mnetniopsis mccradyi, Mayer, 1900, Bull. Museum Comp. Zool. at Harvard Col- lege, vol. 37, p. g, tigs. 22, 23, plate Fig. 9.—Mnemiopsis mccradyi, view of mouth, auricles, and oral lobes. au, auricle; dg, axial extension of paragastric canal; fg, oral forks of the paragastric canals; g, paragastric canal; m, mouth; mn, muscular net in the oral lobes; tnst, meridional subtentacular combs; msv, meridional subventral combs; /, tentacular canal; /ew, axial tentacle; /r, tentacular ridge. From life by the author. Port Royal, Jamaica, May, 1911. The animal is about 100 mm. long, and the general form of the body is very similar to that of M. leidyi. The lateral compression of the body is, however, more marked, while the gelatinous substance is far more rigid and of a decided greenish-amber color and opalescent not trans-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mayer, Alfred Goldsborough, 1868-1922. Washington, D. C. Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectctenoph, bookyear1912
