. Die dänische Ingolf-Expedition. Marine Tiere - arktischen Regionen; Wissenschaftliche Expeditionen; arktischen Regionen. HYDROIDA II 23 Die einzigen gonothecce sind vertauscht, schmal kegelförmig bis fast Clin (. hical, befestigt an der hydrocaulus bv eine rndimentarv Stiel am schmalen Ende; distal, die - mit drei eingerichtet, seltener mit vier oder zwei runden seitlichen Öffnungen, die jeweils mit einem kurzen Hals. Material: "Ingolf" St. 7 63° 3' N, 5° 4' W., Tiefe 600 Klafter 4,5° --> 25 63' N, 54° 25' W., - 582 - 3,3° - 81 6 I'^44' N, 27°oo" W., - 485 - 6,1° "Thor" 6 i° i 5' N, 9 = 33' W., - 872 me

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. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA II 23 The single gonothecce are reversed, narrowly conical to almost clin(.hical, fastened to the hydrocaulus bv a rndimentarv stalk at the narrow end; distally, the- are furnished with three, more rarely with four or two, round lateral openings, each with a short neck. Material: "Ingolf" St. 7 63°i3' N., i5°4i' W., depth 600 fathoms 4, 5° - - 25 63>' N., 54°25' W., - 582 - 3, 3° - - 81 6i'^44' N., 27°oo' W., — 485 — 6, 1° "Thor" 6i°i5' N., 9=33' W., — 872 metres Levinsen (1913 p. 287) believes to have found a blind sack in Lictorrlln pimia/a; this must doubtless be due to an accidental S-shaped curvature of the polyp, which would not, however, produce. ....-.- boat Fig. Vll. Fiuds of Lictorella pinnata iu the Northern .Atlantic. a blind sack of any real anatomical importance. Microtome sections reveal an entirely uniform gastral endoderm, and I have not been able to find any portion of the endoderm histologically corresponding to the epithelium in the blind sack of Sertulariidcr. The "blind sack" observed must thus be due to accident. Lictorella pinnata exhibits a highly remarkable distribution (fig. VII). It belongs to the upper part of the abyssal region, but penetrates as far down as 1300 metres; on the other hand, the species can at times occur right up in the littoral region, and has been met with m the Hardanger Fjord even up at a depth of only 90 metres. Horizontalh-, the species seems to be quite widely distri- buted, but the few records from southern seas are unreliable, as the species has here been confused with Lictorella autipathes (Lamarck). Pictet and Bedot (1900 p. 16) record it from the Bay of Gas-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly res

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• bookcentury1800
• bookdecade1890
• booksu
• bücherubjectarcticregionen