. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. .— 251 their umbrella, the gelatinous connective tissue of which is richly developed and contains a quantity of strong fibrillse and a network of elastic fibres, which structures confer upon it a greater firmness and rigidity. Another characteristic of the group is derived from the structure OL the edge of the umbrella. This is divided by a regular uurubtr. RK FIG. I9l.—Aure!ia aurlfa, from the oral surface. MA, The four oral tentacles with the mouth in the centre; <?£, gen
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. .— 251 their umbrella, the gelatinous connective tissue of which is richly developed and contains a quantity of strong fibrillse and a network of elastic fibres, which structures confer upon it a greater firmness and rigidity. Another characteristic of the group is derived from the structure OL the edge of the umbrella. This is divided by a regular uurubtr. RK FIG. I9l.—Aure!ia aurlfa, from the oral surface. MA, The four oral tentacles with the mouth in the centre; <?£, generative organs; GH, aperture of sub-sinital pit; -Et, sense organ (marginal body); BG, radial vessel; T, tentacle at edge of the disc. of indentations usually into eight groups of lobes between which the sense organs are contained in special pits (fig. 194). The marginal lobes of the Acalephre, like the continuous velum of the HydromeduscK, appear to be secondary formations at the edge of the disc. In the young stage known as Ejihyra, which is common at least to all the Discophora, they jre eiit as eight pairs of Bars, " Ueber die Entwiddnng der Medusa aurita nnd Cyanea capillata," .Yitfi/rt/fneh, 1811. H. J. Clark. •' Prodromns of the History, oJ the Order Lucernarid" Journ. t\f B«*t. Soe, of Xat. 1803. C. Glaus, " Stiidien liber Polypen und Quallcn der Adria," D<-nlwltrifh-n- der /•. Ahademie Ji-r Wixxrnxrh. HV/-«, 1877. C. Clans, '• Untersuchung'en iibcr Charvbdca inarsunialis," Arlcife/t, an* Jan /.od. 'uf. II ir/i, 1878. Also E. Haeckel, 1. 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. London, Swan Sonnenschein &
Size: 1622px × 1541px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookcollectionbiodiversity, bookdecade1890
