. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 138 ECHINOIDEA. II. considerably narrower than in flavescens. — In the anterior petals the number of pores in the anterior series is larger than in flavescens, viz. 6—7, whereas in flavescens of a corresponding size there are only 2—6, the number varying rather much. As the pore-bearing plates of the petals are rather large, this difference is fairly conspicuous. In the posterior series of the anterior petals and in both series of the posterior petals the number is the same in both species. The odd anterior ambulacrum narrow
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 138 ECHINOIDEA. II. considerably narrower than in flavescens. — In the anterior petals the number of pores in the anterior series is larger than in flavescens, viz. 6—7, whereas in flavescens of a corresponding size there are only 2—6, the number varying rather much. As the pore-bearing plates of the petals are rather large, this difference is fairly conspicuous. In the posterior series of the anterior petals and in both series of the posterior petals the number is the same in both species. The odd anterior ambulacrum narrows conspicuously where the fasciole traverses it, which is not the case in flavescens; the number of plates within the fasciole is smaller than in flavescens, specimens of equal size being compared (7 in capense, ca. 10 in flavescens). The tubefeet and their spicules do not present any distinct differences from flavescens; to be sure, I have not seen any such large spicules, as are found in flavescens below the disk, but they are not always met with in the latter species either, and they may well be found in larger specimens of. 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 Ingolf (Cruiser); Danish Ingolf-Expedition (1895-1896). Copenhagen : H. Hagerup
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscientificexpedition
