. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 24, a—c. Anal and subanal region of Echinocardium cor datum: a speci- men from Skagerrak; 5 from Roscoff; c from Naples. in these latter specimens, on the other hand, the tridentate pedicellarise seem comparatively more richly developed than usually. The rostrate pedicellarise (PI. XVII. Figs. 15, 21, 38) are rather like those of flavescens, only still more like tridentate pedicellarise; the blade generally is somewhat pointed, and may have a pro- minent tooth in the point. In some specimens from the Mediterranean I fin
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 24, a—c. Anal and subanal region of Echinocardium cor datum: a speci- men from Skagerrak; 5 from Roscoff; c from Naples. in these latter specimens, on the other hand, the tridentate pedicellarise seem comparatively more richly developed than usually. The rostrate pedicellarise (PI. XVII. Figs. 15, 21, 38) are rather like those of flavescens, only still more like tridentate pedicellarise; the blade generally is somewhat pointed, and may have a pro- minent tooth in the point. In some specimens from the Mediterranean I find such with the blade much narrower (PI. XVII. Fig. 34), recalling very much those of Spatangns. — The tridentate pedi- cellarise (PL XVII. Figs. 22, 23, 30, 43, 48) have leafshaped valves, in the smaller ones joining with their whole edge; in the larger forms the blade is more or less narrowed in the lower part, the edge being irregularly serrate; there is generally some meshwork in the bottom of the blade in these larger pedi- cellarise. In the specimens from Tamaris I find the tridentate pedicellarise unusually broad (PI. XVII' Fig. 30). The largest ones seen were ca. i"5mm, length of head. -- The triphyllous pedicellarise (PI. XVI. Pig. 21) are very peculiar; in the outer part there is a series of broad teeth inside along the edge; the serrations pass a little way up together with these teeth. In about the outer half of the blade the edge is smooth. — Ophicephalons pedicellarise unknown. This species, which was not taken by the Ingolf , is very common in the Danish Seas, and along the Atlantic coasts of Europe, from Northern Norway to the Mediterranean. It is not known from the Faroe-Islands or Iceland. From the American side of the Atlantic it is recorded from. 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
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