. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. l'XIIINOIDRA. II. 89 understand the true relationship not only of many aberrant groups of Spatangoids, hut also their relationship to the Clypeastroids and Echinolampadae . ( Chall. -Ech. p. 148). I give here a graphic representation of the mutual relationship of the Spatangoids, as I under- stand it. It will be seen that my view of the Meridosternata is in rather close accordance with that represented in the tabular view of the Meridosterni given by I may notice expressly that it is not meant as a genealogical tre
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. l'XIIINOIDRA. II. 89 understand the true relationship not only of many aberrant groups of Spatangoids, hut also their relationship to the Clypeastroids and Echinolampadae . ( Chall. -Ech. p. 148). I give here a graphic representation of the mutual relationship of the Spatangoids, as I under- stand it. It will be seen that my view of the Meridosternata is in rather close accordance with that represented in the tabular view of the Meridosterni given by I may notice expressly that it is not meant as a genealogical tree of the genera. As for the families, I do not doubt that they have reallv been derived from one another in the direction here indicated. Plexeehinus Cystechinus(?)2 Pilematechinus Urechinus. Pourtalesia Echinosigra Spatagocystis Ceratophysa Cystocrepis Helgocystis Eehinoerepis Calymnidse Sternopatagus Stereopneustes Ananchytidae. 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 Ingolf (Cruiser); Danish Ingolf-Expedition (1895-1896). Copenhagen : H. Hagerup
Size: 1316px × 1898px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscientificexpedition
