Archive image from page 54 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex4cpt11daniuoft Year: 1899-1953 Textfig. 3. Molpadiodemas acaudum. 1 :.', reds from the tentacles. 3, mils from the gonads. 1-3 X 300. it is not very distinct on account of the shape of the body. Further they have some few calcareous deposits in the tentacles and in the gonads (textfig. 3 1-3) though deposits, as stated, do not occur in the body wall nor in the rudimentary tube-feet. Also repeated examination did not reveal any deposits in the pygal furrow and the respiratory tree
Archive image from page 54 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex4cpt11daniuoft Year: 1899-1953 Textfig. 3. Molpadiodemas acaudum. 1 :.', reds from the tentacles. 3, mils from the gonads. 1-3 X 300. it is not very distinct on account of the shape of the body. Further they have some few calcareous deposits in the tentacles and in the gonads (textfig. 3 1-3) though deposits, as stated, do not occur in the body wall nor in the rudimentary tube-feet. Also repeated examination did not reveal any deposits in the pygal furrow and the respiratory trees. Not only the presence of the pygal furrow but also that of deposits in the tentacles and the gonads, though -in h are lacking in the body wall, places this species within the Pseudostichopus group. I have no doubt as to the validity of the genus Molpa- diodemas but as to that of the species there maybe some doubt, as in reality acaudum in several respects resembles atlanticus Perrier. How far these two species are in reality synonyms cannot for the present be ascertained. Genus Plicastichopus Heding L940. Plicastichopus ingolfi n. sp. Plate I, figs. 4-5. L o c a 1 i t i e s: 61°44' N. 30°29' W. 'Ingolf' St. 18, 2137 m, temp. 3°.0 C. 2 spec 58°20' N. 40°48' W. 'Ingolf' St. 20, 3192 m, temp. 1 .5 C. 1 Diagnosis: Pseudostichopus-like Holothurians with a distinct pygal furrow and large lateral papillae each with one terminal and several lateral tubefeet. There are also tubefeet scattered all over the dorsal side, those along the dorsal ambulacra b c. X â c; c â h Textfig. I. Plicastichopus ingolfi, a part of the left dorsal ambulacrum with three lateral papillae, showing small scattered tube-feet. larger than the others. On the ventral side there are either no or very few and rudimentary tube-feet. Tentacles twenty. Polian vesicles one or two, and stonecanal quite lacking or very rudi- mentary, with faint traces of a madraporite. Respiratory trees paired but
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Keywords: 1890, 1899-1953, archive, arctic_regions, book, bookauthor, bookdecade, bookpublisher, booksponsor, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, k_benhavns_universitet_zoologisk_museum, marine_animals_arctic_regions, page, picture, print, reference, scientific_expeditions, university_of_toronto, vintage, zimmermann_a_albrecht_b_1860
