HYDROIDA II 



Davis Strait, from where the "Ingolf" brought back several colonies, and has now also been found in 

 deeper water right up in the Danmark Strait. From here again, it may be transported into the waters 

 along the north coast of Iceland, as shown by the find at the "Ingolf" St. 127, where the species 

 occurs together with Halicornaria campanulata. 



Zoom. . 600 m. ...._._._._iooom. 



Fig. XLVI. Finds of Cladocarpus formosus in the Northern Atlantic. 



Cladocarpus Diana nov. sp. 



The colonies are singly pinnate with polysiphonic, in the upper parts monosiphonic main stern, 

 which is not particularly strongly pronounced. The primary tube is indistinctly segmented, with long 

 iuternodia, each having on its upper third an apophyse turned almost straight out to the side, alter- 

 nately directed to either side of the stem. The internodium further has three or four sarcothecae, a 

 pair at the upper side of the apophyse, and one or two unpaired in the median line on the lower part 

 of the internodium ; all are adcaulinally split. The internodia of the hydrocladium have a large hydro- 

 theca and three sarcothecse, a supracalycine pair at the hydrotheca aperture, and an unpaired median 

 proximal sarcotheca which reaches with its opening margin barely a little beyond the bottom of the 

 hydrotheca. The supracalycine sarcothecse approach the tubulous form, but are adcladially split; the 

 proximal is of very typical shape, being much widened out laterally towards the opening, so that the 

 latter is seen to be as broad as, or even slightly broader than, the lower part of the hydrotheca; the 

 free adthecal wall has disappeared; the margin is slightly dentate. The hydrothecse are large, some- 

 what compressed laterally, with expanded opening part; the margin of the aperture is armed with 9 

 strong teeth, an abcladial median, and between this and the internodium four on either side. There 



