. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Textfig. 4:2. Psolus hypsinotus. 1 and 2, anal (7), and oral (2), area of a specimen from "Ingolf", St. 25. 3 and 4, oral (3), and anal (4), area of a specimen from "Ingolf", St. 32. 5, Oral valves of the smallest specimen from "Ingolf", St. 25. X 10. The anatomy does not show any features of interest. There is a single polian vesicle, a single stone-canal, well developed but faintly branched respiratory trees. The unpaired retractor is attached immediately be
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Textfig. 4:2. Psolus hypsinotus. 1 and 2, anal (7), and oral (2), area of a specimen from "Ingolf", St. 25. 3 and 4, oral (3), and anal (4), area of a specimen from "Ingolf", St. 32. 5, Oral valves of the smallest specimen from "Ingolf", St. 25. X 10. The anatomy does not show any features of interest. There is a single polian vesicle, a single stone-canal, well developed but faintly branched respiratory trees. The unpaired retractor is attached immediately behind the anterior margin of the sole with a single origin from the longitudinal muscle. The calcareous ring is elegant and fairly well developed, but does not show any structures of interest; from the shape of the calcareous ring it is evident that the ten tentacles are of equal size. be the young of this species seems rather natural, if Ekman is right in regarding P. valvatus as the young of squamatus. There are, however, in the "Ingolf" collections some small Psolus from Davis Strait (St. 32) which are no doubt the young of P. fabricii, and these are so different from P. hypsinotus that any closer relation between P. hypsinotus and P. fabricii is out of the question. This is another fact which weighs against the supposed synonymy of P. squamatus and P. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Danish Ingolf-Expedition (1895-1896); Københavns universitet. Zoologisk museum. Copenhagen H. Hagerup
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
