Archive image from page 178 of The Danish Ingolf-Expedition (1907). The Danish Ingolf-Expedition danishingolfexpe0402ingo Year: 1907 IvCHINOIDKA. II. I7I larger specimen (130™™) I count 7—8 such plates in each series, all being provided with a pore. Of the inner plate without pore no trace is seen, and since there is otherwise such a plate for each three pore-bearing plates, this fact must mean that the poreless plate becomes absorbed on passing to the buccal membrane. On the abactinal side it is seen that the larger primary plate is from the beginning undivided; but already from the third o
Archive image from page 178 of The Danish Ingolf-Expedition (1907). The Danish Ingolf-Expedition danishingolfexpe0402ingo Year: 1907 IvCHINOIDKA. II. I7I larger specimen (130™™) I count 7—8 such plates in each series, all being provided with a pore. Of the inner plate without pore no trace is seen, and since there is otherwise such a plate for each three pore-bearing plates, this fact must mean that the poreless plate becomes absorbed on passing to the buccal membrane. On the abactinal side it is seen that the larger primary plate is from the beginning undivided; but already from the third or fourth the dividing line has appeared, though not easily discernible before nearer to the ambitus. All the pores are distinct, only that of the inner small plate- distinctly the larger, corresponding to the larger size of the tubefoot of this plate.
Size: 1444px × 1385px
Photo credit: © Bookive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1907, americana, archive, arctic_ocean, biodiversity, blc, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, ingolf_cruiser_, mblwhoi, mblwhoi_library, page, picture, print, reference, scientific_expeditions, vintage
