. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 9:5 Mr. :\r. C. March on the traced from a period when these internal ribs alternate with the external ribs, and a time when they are entirely- independent of them. The cardinal plateau is a subsequent development to the first-formed teeth and arises on them. Fio'. Development of Pectunculus obovatiis. (After Bernard.) 1 & 2, right valve ; 3-7, left valve. Li = primary ligamental pit; C = baud of crenulations. Where these first-formed teeth remain as internal ribs they
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 9:5 Mr. :\r. C. March on the traced from a period when these internal ribs alternate with the external ribs, and a time when they are entirely- independent of them. The cardinal plateau is a subsequent development to the first-formed teeth and arises on them. Fio'. Development of Pectunculus obovatiis. (After Bernard.) 1 & 2, right valve ; 3-7, left valve. Li = primary ligamental pit; C = baud of crenulations. Where these first-formed teeth remain as internal ribs they are called " dysodont/^ when they are developed on the plateau, or take their place on it, they become true taxodont teeth, and as such become capable of growth into the usual I. 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 London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
