File:Geological magazine (1914) (14784477023).jpg

Identifier: geologicalmagazi611914wood (find matches)
Title: Geological magazine
Year: 1864 (1860s)
Authors: Woodward, Henry, 1832-1921
Subjects: Geology
Publisher: London (etc.) Cambridge University Press
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
but theobjective reality of the pores in Edrioaster will, I trust, no longer becalled in question. Certain other markings near the outer margin of the radial groovewill be described in connexion with the cover-plates, to which wenow pass, leaving the circumoral modifications of the floor-plates forfuture consideration. EXPLANATION OF PLATES X-XII. Plate X. Edrioaster bigsbyi. Specimen A, from drawings made in 1899 by Mr. Gilbert C.Chubb. Fig. 1. Adoral face. Towards the observer is the posterior interradius,in which are seen the anus and the hydropore. The dark triangulardepression between those structures is due to fracture of the plates.X 2 diam. Fig. 2. Posterior view, x 2 diam. Fig. 3. Adapieal face, the posterior interradius being away from theobserver. X 2 diam. Fig. 4. Some of the fioor-plates, showing the groove that leads fromthe poral depression to the main radial channeL The depression for thecover-plates is not clear in this lighting, x 10 diam. Geol. Mag. 1914. Plate XII.
Text Appearing After Image:
Uerriug photo. Loudou Stcreoscuin KDRIOASTER LEVIS. .Revieivs—American Palceontology. 125 Fig. 5. A solid section across the food-groove to show the relation ofcover-plates to floor-plates ; based mainly on portions of 1. ant. and 1. post,rays, x 5 diam. Fig. 6. A transection of the floor-plates, showing their relation to theinterradials. The tloor-plate on the left is viewed on its sutural surface,which bears the pore-canal. Based on the broken regions of ant. andr. ant. rays, x 5 diam. Fig. 7. The hydropore. The adjacent regions of the floor-plates showthe depression that receives the ends of the cover plates. X 10 diam. Fig. 8. Parts of the floor-plates and ccjver-plates near the peristome,showing the accessory plates, x 10 diam. Fig. 9. The periproct. x 8 diam. Fig. 10. A section reconstructed along the line a-b in Figs. 1 and .S,showing the approximate thickness of the plates and the relations of theadapical hollow and lobes. Nat. size. Fig. 11. Part of the thin, plated integum

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