Archive image from page 378 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex4apt1a2daniuoft Year: 1899-1953 HCUINUIDEA. II. 75 interaiiitnilacra (posterior series) is a lilllc uncertain, as I was unable to see distinct} tlie limit hetwen it and the ank\loscd genital i)late. There are only two genital openings, covered by long genital jnipilla;; it is probably the an- terior pair which is found, the posterior pair liaviug disapjicared, evidently because there is no room for more than one pair of genital organs. The madre- poric pores are rather few i
Archive image from page 378 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex4apt1a2daniuoft Year: 1899-1953 HCUINUIDEA. II. 75 interaiiitnilacra (posterior series) is a lilllc uncertain, as I was unable to see distinct} tlie limit hetwen it and the ank\loscd genital i)late. There are only two genital openings, covered by long genital jnipilla;; it is probably the an- terior pair which is found, the posterior pair liaviug disapjicared, evidently because there is no room for more than one pair of genital organs. The madre- poric pores are rather few in number (PI. \'I. Fig. 17), placed behind the genital pores; in the specimen of 26''' there are only two madreporic pores. The genital openings are present only in the two larger specimens and in a separated head-end. The smaller specimen shows no trace of genital openings. This species thus is not mature till a rather considerable size, since a specimen of 22''' is im- mature. The primary spines are rather scarce, only along the actinal and abactinal keel they are close-set; also along the anterior border they are more numerous; there is no serial arrangement of the spines. They are all short, the longest scarce)' reacliing 3™'' lengtli; they are curved, widened towards the point, wliicli is generally bifid (PI. XL Fig. 44); tliey are more or less serrate, generally more on one side than on tlie otlier. Tliose along the plastron are somewliat more widened tlian tlie abactinal ones; those on the jjosterior end of the abactinal keel bend down over the anal area. The spines within the oral invagination (PI. XI. Fig. 21) are, as usual, coarser and stronger than those on the outside; the\- are curved and more or less sharply serrate along the concave .side. The miliary spines (PI. XI. F'ig. 43) are likewise rather scarce in nunrber; they are onlj' ca. o-5''' in length, curved towards the point which forms a somewhat widened, slightly fenestrated plate. The clavulae of the fascio
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Keywords: 1890, 1899-1953, archive, arctic_regions, book, bookauthor, bookdecade, bookpublisher, 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, vintage
