Archive image from page 90 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 Fig. XLIII. Cladocarpus integer. a. Basal parts of a hydrocladiurn and its phylactogoniutn with an entire gouotheca, from the Trondhjem fjord (X 4°)- — • Hydrotheca of the same colony (X 60). — c. Hydrotheca of a colony from 'Ingolf' St. 98 (X 60). gonothecse are very often fixed to the stem or more correctly, to the apophyses; Ritchie's descrip- tions show that this may often occur on the whole for an entire colony, and that the phylactogonia may in consequence
Archive image from page 90 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 Fig. XLIII. Cladocarpus integer. a. Basal parts of a hydrocladiurn and its phylactogoniutn with an entire gouotheca, from the Trondhjem fjord (X 4°)- — • Hydrotheca of the same colony (X 60). — c. Hydrotheca of a colony from 'Ingolf' St. 98 (X 60). gonothecse are very often fixed to the stem or more correctly, to the apophyses; Ritchie's descrip- tions show that this may often occur on the whole for an entire colony, and that the phylactogonia may in consequence be altogether lacking, which is also exceptionally found to be the case in some of the colonies from Trondhjem Fjord. The great majority of the colonies have, however, at any rate in considerable parts of each, developed primitive but typical phylactogonia (fig. XLIII a). These pro- ceed from the basal internodium of the hvdrocladium beside the proximal sarcotheca. The phylacto- gonia are practically always unbranched, and furnished with two somewhat onesidedly arranged rows of sarcothecse, set either in pairs or irregularly placed; only once or twice have I found phylactogonia which had, by dichotomic division, developed a short lateral branch of the same structure. The phylac- togonium also exhibits irregular segmentation. It has as a rule two or three gonothecce on the same side as the sarcothecse. The gonotheca is of the typical Cladocarpus form, with upper lip; this is, however, shorter than in most other species, so the opening is not yet directed downwards. Ritchie's specimen (1912 p. 228) should, it would seem, be taken as the representative of a special variety Ritcliici nov. differing from the typical form in having the hydrotheca margin slightly
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