. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 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 with a common origin. Calcareous deposits lacking in the body wall but prese
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 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 with a common origin. Calcareous deposits lacking in the body wall but present in the tentacles ami m the terminal ends of the tube-feet . Description: The specimens measure from 4 to Tern in length ami are in shape (Plate 1. tiu. 1) fusiform with a fairly tlat ventral side. Along the ventrolateral ambulacra there are about twenty large conical papillae, each with a large terminal and a number of smaller lateral tubefeet (cf. Plate 1. fig. 5, textfig. 4). Along the dorsal ambulacra there are two rows of alternating large tubefeet or small papillae with a terminate large tubefoot. The mouth is ventral, and the anal opening is situated in a fairly deep vertical pygal furrow. There are twenty tentacles: directly counted there are but 17, the shape of the calcareous ring, however, indicates twenty. In the type specimen there is but one polian vesicle. In the other specimens there are. how- ever, two polian vesicles. The stone-canal is faintly developed or quite rudimentary. The respiratory trees are fairly large but with a common Text lit:. 5. Plicastichopus ingolfi. 1. right ventral radial â L5. .'-' ami .';, rods from the tentacles, / ami .'>. rods item the gonads. t>. spicules from the end of a minor tube (net. 2 â 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 wor
Size: 2640px × 947px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
