Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 800
f the section, it becomes apparent that these 1 See their Description of Parkeria and Loftusia in Philosophical Transac-tions, 1809, p. 721. Though it appears convenient to allow this description ofParkeria to remain, it must be noted that some of those most competent to judgeare of opinion that… … Fig. 560.—Portion of one of the lamellaeof Parkeria, showing the sand-grains ofwhich it is built up, and the passagesextending into its substance. •chamberlets, instead of being arranged in successive rinys on a singleplane, so as to form a disc, are grouped in concentric spheres, eachcompletely…
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