. E?chinodermes. Echinodermata. FiG. 7. — Oursin ouvert suivant l"é(|u;Ucur, les deux moitiés rabattues de ]);\rt vi d'auti'C pour montrer le luho dincstif (d'a- près Tidemann).. 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 Kœhler, R. (Rene?), 1860-; Fe?de?ration des socie?te?s franc?aises de sciences naturelles. Office central de faunistique. Paris : P. Lechevalier

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectechinod, bookyear1921