. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. I'ORIFERA. III. 6l chela; arenatae; they have a more or less, sometimes very strongly, curved shaft, the end-parts are relatively small. The length is 0024—0-038mm, and the diameter of the shaft 0-003—0-005mm. Tne chela? occur numerously and rather densely in the dermal membrane. This species may vary somewhat, especially with regard to the size and shape of the chelae; it is most characterised by the fusiform tornota, and this character in conjunction with the shape of the acanthostyli distinguishes the species with certain
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. I'ORIFERA. III. 6l chela; arenatae; they have a more or less, sometimes very strongly, curved shaft, the end-parts are relatively small. The length is 0024—0-038mm, and the diameter of the shaft 0-003—0-005mm. Tne chela? occur numerously and rather densely in the dermal membrane. This species may vary somewhat, especially with regard to the size and shape of the chelae; it is most characterised by the fusiform tornota, and this character in conjunction with the shape of the acanthostyli distinguishes the species with certainty. Locality: Station 54, 630 08' Lat N., 150 40'Long. W., depth 691 fathoms; station 98, 65° 38'Lat. N., 260 27' Long. W., depth 138 fathoms. The localities are situated in the Denmark Strait and South of 16. H. perforata n. sp. PL III, Fig. 4, PL VII, Fig. 3. Incrusting; surface somewhat hispid; main skeleton rather dense. Spicula: megasclera; the skeletal spicules acanthostyli with a very small or no head, entirely spiued, or the longer with a smooth apical part, o-oSo—o-^j, not divided into two groups; the dermal spicules slender tornota o-ij8—o-22",m; microsclern chela arcuatce, very varying in size, 0-021— <r054""". This species grows chiefly on Brachiopods, as well on dead shells as on living specimens; we have in all sixteen specimens, thirteen of which grow on Brachiopods; the other three grow re- spectively on a Bryozoon, a worm-tube and a Peeten-sheW. The greatest extent to which the species reaches is about 16mm, and the thickness is not beyond 0-5mm. The colour (in spirit) is brownish yellow to dark greyish brown. The surface is hispid on account of the longer styli projecting beyond it. The dermal membrane is a thin and transparent film. In the membrane larger and smaller, circular or oval openings are found, which are oscula and pores; they were measured of sizes from about 0-05 to 0-3n,m, but there seem to be all inter
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1910
