Archive image from page 34 of The Danish Ingolf-Expedition (1917). The Danish Ingolf-Expedition danishingolfexpe0404ingo Year: 1917 ANNELIDS. I. 29 have the same ease as we know in Admetella, namely that two segments are passed over. The last elytron in H. acanellse is found 011 segment 32, whereafter each of the following rings carry on each side a long thread-shaped dorsal cirrus. This part of the animal consists of 17 segments. The anal ring bears two exceedingly long anal cirri. In all there are 15 pairs of scales. They do not seem to cover the dorsum thoroughly, but leave a narrow strea
Archive image from page 34 of The Danish Ingolf-Expedition (1917). The Danish Ingolf-Expedition danishingolfexpe0404ingo Year: 1917 ANNELIDS. I. 29 have the same ease as we know in Admetella, namely that two segments are passed over. The last elytron in H. acanellse is found 011 segment 32, whereafter each of the following rings carry on each side a long thread-shaped dorsal cirrus. This part of the animal consists of 17 segments. The anal ring bears two exceedingly long anal cirri. In all there are 15 pairs of scales. They do not seem to cover the dorsum thoroughly, but leave a narrow streak uncovered in the middle. The head (PI. I, fig. 13) is somewhat broader than long. The median incision is rather narrow, but can be followed almost to the base of the cephalic lobe. The two frontal prominences are distinct, directed forwards and not diverging conspicuously. The eyes are relatively large; the foremost pair somewhat prominent, lens carrying. The hindmost two are situated at a rather long distance from each other near the base of the cephalic lobe. The unpaired antenna is considerably long, somewhat longer than the palps. The paired antennae are about one third of the length of the unpaired antenna. The palps are thick, taper gradually towards the very short terminal filament. The tentacular cirri are somewhat longer than the unpaired antenna. None of these appendages are provided with papilla:. The foremost scales are almost circular, the others more ovoid in shape, the hindmost broadly reniform. They are den- sely beset with minute conical bodies arranged in more or less regular rows over the surface of the scale; along the outer edge are found some spiny prominences not very conspicuous and a few thread-shaped papilla?. The uotopodial branch of the foot is but feebly developed and only few dorsal setae are present. The neuropodial branch bears a bundle of flabellately arranged setae. The dorsal cirrus is very long and slender and tapers gradually towards the t
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