Medusae of the world . Fig. 239.—Pantachogon haeckelii, after Maas, in Ergeb. Plankton 240.—Pantachogon rubrum, after Maas, in Hydromedusen, Siboga Expedition. Unfortunately, the color is unknown and it is possible that this Arctic species may prove tobe identical with the deep-water P. rubrum of the tropical Atlantic and Pacific. P. haeckeliiappears to become mature when smaller than P. rubrum, but much allowance for variationmust be made when comparing preserved specimens one with another, especially where theexamples are few, as in this case. Pantachogon rubrum Vanhbffen. Pantach

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Medusae of the world . Fig. 239.—Pantachogon haeckelii, after Maas, in Ergeb. Plankton 240.—Pantachogon rubrum, after Maas, in Hydromedusen, Siboga Expedition. Unfortunately, the color is unknown and it is possible that this Arctic species may prove tobe identical with the deep-water P. rubrum of the tropical Atlantic and Pacific. P. haeckeliiappears to become mature when smaller than P. rubrum, but much allowance for variationmust be made when comparing preserved specimens one with another, especially where theexamples are few, as in this case. Pantachogon rubrum Vanhbffen. Pantachogon rubrum, Vanhoffen, 1902, Wissen. Tiefsee Expedition, Dampfer V aldivia, , Lfg. 1, p. 63, taf. 9, fig. 9; taf. 10, fign. 19, 20; , fig. 25.—Maas, 1905, Craspedoten Medusen derSiboga Expedition, Monog. 10, p. 55, taf. 10, fig. 66. (!) Pantachogen haeckelii, Maas, 1893, Ergeb. der PlanktonExped., Bd. 2, K. c, p. 17, taf. 1, fig. 2. According to VanhofFen the bell is 13mm. high, 10 mm. w

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910