A treatise on zoology . Fin. XLVI. Ventral surface of Antedon hifido,diagrammatised from various authori-ties. X 4 diain. As, anus ; 0, mouth ;p, pinnules; s, sacenli; ?(•.;), water-pores. Fig. XLVH. ^?trtical section througli tegmen and under-lying structures of Antedon bifida. Hhows fourpores, with ciliated funnels (c/), piercing theintegument (teg), and communicating by awater-vessel (?(;r) with lacunar vessels (/) in theconnective tissue; of the mesentery (m). Tliefunnels are cut through in different , fibrous layer of integument; c, coelomiccavities ; ij, gut-wall, showing out
A treatise on zoology . Fin. XLVI. Ventral surface of Antedon hifido,diagrammatised from various authori-ties. X 4 diain. As, anus ; 0, mouth ;p, pinnules; s, sacenli; ?(•.;), water-pores. Fig. XLVH. ^?trtical section througli tegmen and under-lying structures of Antedon bifida. Hhows fourpores, with ciliated funnels (c/), piercing theintegument (teg), and communicating by awater-vessel (?(;r) with lacunar vessels (/) in theconnective tissue; of the mesentery (m). Tliefunnels are cut through in different , fibrous layer of integument; c, coelomiccavities ; ij, gut-wall, showing outer fibrouslayer, epithelium, and inner cuticle. (AfterVogt & Jung, 18SG.) Greatly magnified. anus often opens low down on the anterior face of the tube. Thestatement has been definitely disproved for many forms hithertosaid to have such pores. But Wachsmuth & Springer (1897,pi. vii., figs. 2b, 5, 6, 9) support it by figures which, if correct and
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
