. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 28 AITINIARIA ii,.!, .iriM- by teariii;! of pifcea from the liiiibus as in .VWri- ⢠l at III artificial pitfos of Sayartiofjelun vidualus ''â¢--â 'â ill thfsf siHH-ios old mesenteries uikI a rule only one development Dm the other hand, in ; â .miplete destruction of the c) ,_i . ^ firowth of a tentacle in the directive plane (see C'arl but the one development zone was retanled. llv the concurrence between the development zones in- asmuch the one can be retarded in its
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 28 AITINIARIA ii,.!, .iriM- by teariii;! of pifcea from the liiiibus as in .VWri- ⢠l at III artificial pitfos of Sayartiofjelun vidualus ''â¢--â 'â ill thfsf siHH-ios old mesenteries uikI a rule only one development Dm the other hand, in ; â .miplete destruction of the c) ,_i . ^ firowth of a tentacle in the directive plane (see C'arl but the one development zone was retanled. llv the concurrence between the development zones in- asmuch the one can be retarded in its development I think that all arrangements ileviating from the hexamerous type can be ex- plaine«l. The nuinlier of perfect pairs varies a little, typically 12 j»airs are jx-rfect, sometimes they are fewer, sometimes more numerous. I have, however, not found more than 14 perfect pairs arranniil d (directives), f), d 1 d 5. The retractors of the perfect [Kiirs are iliffuse, with usually high folds but fairly concentrated, es[MTially those of the directives in the region of the actiuopharynx. The jwrietobasilar muscles are weak, the basilar muscles distinct. The size of the neiiiatocysts of the acontia is summed up from 15 indivirluals apart from those the neiiiatocysts of which have been measured by .Stei', the size of the other nematocysts only from a few specimens. Sagartiogeton tubicolus (Dan. & Koren.). I'l. IV liL's. J. :>. I'hdlin tuhicola n. sp. KoRES and 1877 PI. 9 figs. 1, 2. Diagnosis: Pedal disc very broad. Column cylindrical or mon- conical, more or less divisible into .scapus and sca- pulus, the former with an deciduous cuticle and with very small, .s<-attered tenaculi. Cinclides in the sca])ulus below the sphincter ami in the lowest part of the body. Sphincter long, strong, alveolar-reticular, in its upper part reticular. Tentacles up to about IIS of ordinary length, the inner longer than the outer one
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
