. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA II 43 Examination of a large amount of material leaves no doubt as to the correctness of this. The species is enormously multifarious in its power of variation, and has a remarkable capability of changing its appearance; an examination of the branches, however, will always reveal the characteristic, almost spherical apophyse typical of the species, and the distinguishing characters established are seen to be founded on growth stages. Dons does not appear to have noticed that his f
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA II 43 Examination of a large amount of material leaves no doubt as to the correctness of this. The species is enormously multifarious in its power of variation, and has a remarkable capability of changing its appearance; an examination of the branches, however, will always reveal the characteristic, almost spherical apophyse typical of the species, and the distinguishing characters established are seen to be founded on growth stages. Dons does not appear to have noticed that his figure D. 5 shows how the male gonotheca can be formed in hydrotheca as a heteromorphotic renovate. This is particularly interesting in the case of the present species, since other heteromorphotic renovates likewise appear in the same in nature, as tendril-like stolon formations in place of hydranths. Dons mentions such renovates, with illustra-. 300 m. 600 m. tooo m. Fig. XVI. Ivocalities of Halechim curvicaiih- in the Northern Atlantic. 2000 m. tions, and points out that these very features have served as the basis on which the species Haleciiini tuirabtle was established. The species is thus characterised b\- a less lively h\dranth renewal, but has on the other hand a more marked tendency to form heteromorphotic renovates than most other forms of Haleciuin. Haleciitm cjirvicanlc is a markedly high-arctic species, belonging to the littoral region. Only quite exceptionally does it penetrate into boreal waters (fig. XVI) as for instance at Iceland. Off the coast of Norway it has not yet been met with south of Bjarkoy. Haleclum muricatum (Ellis and Solander) Johnston. 1786 Sertularia vmricata, Ellis and Solander, The natural history of many curious an uncommon Zoo- phytes, p. 59, pi. 7, figs. 3—4. 1847 HaleciuDi luiiricahiiii, Johnston, A histor\- of the British Zoophytes, p. 60, pi. 9. figs. 3—4 6*. Please note that these images are extracted from scanned page images that ma
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