Archive image from page 18 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 HYDROIDA II II creeping colonies of Lafoea gracillima, and a number of colonies which have later been identified as Lafoea pygmcea should doubtless be referred to Lafoea gracillima. Bonne vie, (1899 p. 62) notes in her table as to the hydrothecse that they have 'slightly outward-curving margin'; this does not agree with Hincks's expression 'hydrothecse . . . cylindrical, elongate and narrow' or with his drawing of the species. In my first report on the hydroids
Archive image from page 18 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 HYDROIDA II II creeping colonies of Lafoea gracillima, and a number of colonies which have later been identified as Lafoea pygmcea should doubtless be referred to Lafoea gracillima. Bonne vie, (1899 p. 62) notes in her table as to the hydrothecse that they have 'slightly outward-curving margin'; this does not agree with Hincks's expression 'hydrothecse . . . cylindrical, elongate and narrow' or with his drawing of the species. In my first report on the hydroids from 'Michael Sars' (1903 the table) I recorded Lafoea pygmcea from several localities, giving also a drawing of the coppinia of the species; subsequent revi- sion of the material has shown me that the specimen indicated is, like most of the others, a typical, creeping Lafoea gracillima, while some few colonies are creeping L'afoea duinosa. Lafoea pygmcea must . boom. Fig. II. Localities of Lafoea gracillima forma typica • and forma elegantula -\- in the northern Atlantic. In the hatched regions the literature denotes a common occurrence of the species. (The dates from British seas are incomplete on account of a general confusion with Lafoea fruticosa). thus mainly be regarded as synonymous with Lafoea gracillima and Calycella syringa, and can accor- aingly no longer be counted as an independent species. Lafoea gracillima appears in two forms, affording parallels to those of the following species. The finely built forma typica is quite cosmopolitan in its occurrence, and has been met with in all seas from pole to pole. In arctic — and as far as can be seen also antarctic — waters, there has also developed, in addition to forma typica, a more robust and closely built forma elegantula, the stalk of which generally commences with a single loose winding, continuing then in a varying number of close turns. Forma elegantula is, as mentioned, arctic, but may (text fig. II) al
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