. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA 39 The species may be divided into two forms: Forma genuina, growing, in colonies more openly constructed, on stones and shells {My/ilus)\ It is delicately built and bluish or rose-coloured. Forma sqiiatiiata forming clusters of polyps more brick-coloured or yellowish-red on the leaves of Fucoideac\ its polyps are large and robustly built. Material: Iceland: Reykjavik Vestmanney The Faroe Islands: Sundelaget north of Kvalvik depth 3 — 4 fathoms, on the shore (on Fucoidcae) on the
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA 39 The species may be divided into two forms: Forma genuina, growing, in colonies more openly constructed, on stones and shells {My/ilus)\ It is delicately built and bluish or rose-coloured. Forma sqiiatiiata forming clusters of polyps more brick-coloured or yellowish-red on the leaves of Fucoideac\ its polyps are large and robustly built. Material: Iceland: Reykjavik Vestmanney The Faroe Islands: Sundelaget north of Kvalvik depth 3 — 4 fathoms, on the shore (on Fucoidcae) on the shore (on Fucoideae) (There also occur specimens marked "Faero" without particular data). Clava ?iinlficon/is and Clava sqiiainata are recorded by most investigators of hydroids as two separate species; the distinguishing characters, however, are rather vague, being made out by the closer or opener occurrence of the polyps in the colony or by the colour of the colonies. A copious material from various localities, in fact, presents all transitions possible, and it is virtually impossible to draw any certain limit between the siDecies. A closer inquiry soon makes clear to us that the points of difference must be of biological nature, and the two species, therefore, have to be regarded only as biologically determined "; of a single species, which I, accordingly, denominate forma genuina and forma sqiiiiiata. The occurrence of typical colonies of the forma gemiina^ which are, in. Text-fig. K. The distribution of Clava imdticornis iu the Northern Atlantic. (In the hatched part of the Norwegian coastal region the occurrence is rather scarce).. 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. Ha
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
