. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fii;. 32. SiKjartiogeton tiiliiculua. Transverse sectidri of tlie actiiKipliarynx. was thick, it were alveolar (textfig. 31). The ectodermal nmscles of the tentacles show coarse folds, the radial folds of the oral disc were closer set. The actinopharynx was of the usual struc-. Fig. 33. Smjarlioijetoii tulni'oliis. .Scctiiiii iil a |i<Tfi'(t mesentery at the end iif tlie artin(i|iliaryn\-, ture, the lon^dtudinal riilges of the ectoderm ])ass over into the cnidoglandular tract of
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fii;. 32. SiKjartiogeton tiiliiculua. Transverse sectidri of tlie actiiKipliarynx. was thick, it were alveolar (textfig. 31). The ectodermal nmscles of the tentacles show coarse folds, the radial folds of the oral disc were closer set. The actinopharynx was of the usual struc-. Fig. 33. Smjarlioijetoii tulni'oliis. .Scctiiiii iil a |i<Tfi'(t mesentery at the end iif tlie artin(i|iliaryn\-, ture, the lon^dtudinal riilges of the ectoderm ])ass over into the cnidoglandular tract of the tilaments. The (ignre .'52 shows a section of the actinopharynx with the singh' siphoiioi;ly|)h. The were irregularly arningcd in correspondence with tlie jin'sence of only one pair of directives. There were 2.') mesenteries perfect and several imperfect in almost the whole region of the actino])harynx, I have, however, not examined the upper- most part of the liodv, some more were per- fect tiiere. Of the ])erfect mesenteries lO formed pairs, three mesenteries were single. .At the linilius I i-ounted 120 I.'JO mesen- teries, at the margin the mesenteries mav have been 72 as the specimen had 72 tentacles. In the middle part of the body the mesenteries seemed to be fewer. Thus, the grow from the margin as well as from the limbus but certainly more rajjidly from the latter. Tlie retractors of the perfect mesenteries were coii- ceiitnited in their upper part and provided with high folds (fig. 33). The niesogloea, of the was thickened, especiallv in the lower ])art of the .specimen, and the ])arietobasilar muscles situated on a distinct fold of the niesogloea (ttg. 33). The neniatocysts of. 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 resemble the original Danish I
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
