. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fij;. 11. CijiilliDimdiinii iiujojfi n. up. Siilitary simple sclerites (/;, d\ and (|iuiiliuplets (((, (â ) Ikiid the upper part iif the aiithosteh', (-ompare fig. 13 /). /.line ,. r, soiiie of fhe f\iseil sclerites fiiini tlie same part lit the ziioiii. about mm are rather frequent. The outer calcareous mesh- work in the stolon is .separated from the inner skeleton bv a delicate, foliated and perforated liorny or chitinniis membrane. Due to the scarcity of the material it has nut b
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fij;. 11. CijiilliDimdiinii iiujojfi n. up. Siilitary simple sclerites (/;, d\ and (|iuiiliuplets (((, (â ) Ikiid the upper part iif the aiithosteh', (-ompare fig. 13 /). /.line ,. r, soiiie of fhe f\iseil sclerites fiiini tlie same part lit the ziioiii. about mm are rather frequent. The outer calcareous mesh- work in the stolon is .separated from the inner skeleton bv a delicate, foliated and perforated liorny or chitinniis membrane. Due to the scarcity of the material it has nut been possible to ascertain whether in the body wall of the zimid an inner horn\' meshwork is , the oi-currence of which Dkiciim,\nx (I'J;3()) uses as a diagnostic character for the genus (7/"''"'/""'""" ⢠â¢"*⢠however, such an inner Imrny layer exists in the stolons it is almost certain that a similar layer may be found in the zonids. The zooids are provided with a. sonu'times fairlv thick, horii\' or chitinous cuticula. 'I'he IVagmentary basal part nf a. zooid, winch is figured in fig. 14 /, shows a very interesting feature, viz. that a ealeareous skeleton di\iiles the coelenteric cavity into eight main loniii- tudinal canals se]iarated by tin\- calcareous walls, forming in the centre of the zimid a more irregular meshvvork with smaller canals, the structuii' of this imier calcareous skeleton is the samr as m the outer walls of the anthostele. The height of this IVaiiineiila rv zooid is about , and the diameter is about 1 mm, of about the same size as in thi' small zooid figured in tiu. I I </ r and considerably smaller than in the ,iliii\r descnbed zikikI (fig. I.'!) in wliii h no trace of .siirh an ninei' skeletal si iiirt me was seen. An intrusion in the basal pari of the coeleiitriic ca\it\ of a very calcaremis meshwork was, however, observed in a ver\- damaged zooid about o mm loni^ in contracte
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
