. Echinoidea of the Swedish South Polar Expedition . Fig. 25. Actinal skeleton, left side, of Amphipn. Lorioli. On the right side the outline is somewhat uncertain in the part from the mark * to the posterior edge; the same is the case with the hindmost right epi- proctal plate and with the plates on the right half of the peristome, these parts not having been denuded. The plates on the periproct were not drawn with camera.

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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1910