. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 126 HYDROIDA II which is elHpsoidal in section. Even though this form may predominate in many colonies, it is nevertheless far from constant; a very high degree of variation may normally be observed even within a single colony (fig. LXV c—k). We often find, on one and the same branch, gonothecse with two points, others with but one, and some with none at all. (This applies, of course, only to acrocyst- bearing, fully developed, gonothecse; those shown were all provided with acrocysts.
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 126 HYDROIDA II which is elHpsoidal in section. Even though this form may predominate in many colonies, it is nevertheless far from constant; a very high degree of variation may normally be observed even within a single colony (fig. LXV c—k). We often find, on one and the same branch, gonothecse with two points, others with but one, and some with none at all. (This applies, of course, only to acrocyst- bearing, fully developed, gonothecse; those shown were all provided with acrocysts.) Now while in some colonies the two-pointed gonothecse are numerically predominant, though it is extremely seldom that they are practicaUy supreme, this "normal" form of gonotheca is in the minority in other colonies, where on the contrary the great majority are of the one-pointed type; the entirely spineless. 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
