. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 19 yard and Delaware Bav in many localities 76-640 fms; 39°59'16" N. 70'18'30" W. 26U fn'is: .3S=21'50" X. 7;r32' W. 193 fnis. (Blake- exped.) Exterior aspect: The pedal disc is broad, attachoil to pebbles or shells, often clasping the tubes of Hi/aliiioecia ar/ijex. The column is elongated in extended state, the middle part narrower than the proximal and distal ones, in the contracted state it forms a broad, low cone, sometimes it is nearly flat. The scapus is pr
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 19 yard and Delaware Bav in many localities 76-640 fms; 39°59'16" N. 70'18'30" W. 26U fn'is: .3S=21'50" X. 7;r32' W. 193 fnis. (Blake- exped.) Exterior aspect: The pedal disc is broad, attachoil to pebbles or shells, often clasping the tubes of Hi/aliiioecia ar/ijex. The column is elongated in extended state, the middle part narrower than the proximal and distal ones, in the contracted state it forms a broad, low cone, sometimes it is nearly flat. The scapus is provided with a cuticle and especially in the lower part of the body provided with tenaculi, which are very distinct when the cuticle is removed. According to Verrill the scapus of some si)ecimens can be nearly naked, probably the cuticle of such specimens is lost. Cinclides are present below the sphincter and in the proximal jiart of the scapus. The scapulus is naked and longitudinally sulcated in introverted state of the distal body-end. The tentacles are slender, acute, the inner consiileniblv longer than the outer ones, in number up to about 96, in the "Ingolf"- specimens fewer and hexamerously arranged. More than half the oral disc is occupied by tentacles. The 2 siphonoglyphs are distinct. Anatomical description: The ectoderm and mesogloea of the scapus are of ordinary thickness. The cinclides seem to be prin- cipallv excavations of the endoderm. The endodermal muscles of the column are weak, the sphincter rather strong, not .stratified, reticular in ts upper part, more alveolar in its lower, long and. Fijs;. 18. ScKjartiogeton verriUi. Section of a perfect mesentery of the first order about in the middle of ( Fisli Com.) usually not occupying half the breadth of the mesogloea and wholly separated from the endodermal muscles of the column. The sections of the sphincter of two specimens, the one taken by the U. S. Fish Conmiission, the other by
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
