. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ANNELIDS. I. 2] In the small specimens the setae are comparatively somewhat longer than in the large, and the form of the animal on the whole short and broad, the result will be that the small specimens, seta; included, are about equal in lenght and width. The largest specimen, the length of which is 16 mui., has a width of 6 mm. When the setae are included, it measures 1 i mm., consequently consider- ably more than half the length of the animal. The colour varies as regards my material according to the size of the animal. W
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ANNELIDS. I. 2] In the small specimens the setae are comparatively somewhat longer than in the large, and the form of the animal on the whole short and broad, the result will be that the small specimens, seta; included, are about equal in lenght and width. The largest specimen, the length of which is 16 mui., has a width of 6 mm. When the setae are included, it measures 1 i mm., consequently consider- ably more than half the length of the animal. The colour varies as regards my material according to the size of the animal. While the colour of the largest must be described as very dark-violet, almost black-violet, and very iridescent, the young specimens are all slightly pigmented and of the well known milk-white colour, which is always assumed by transparent, pelagic animals when thev are thrown down into spirit. (>nly the pharynx is with the young specimens of a dark colour, while the living animal is likely to have been almost colourless and transparent. This ease grew extremely interesting in that another pelagic Poly- noid, a Drieschia was found in my material among the species here dealt with, also a small, transparent form, but the proboscis of which was strongly pigmented with the same dark-violet colour which was found in the same organ of //. Hubrechti. In this connection it must be allowed to call to mind the black and very dark coloured deep-sea fishes which are specially dealt with in Murray and Hjort's work "the Depths of the ocean" and which the authors indicate as living in similar depths as the animal under consideration. The cephalic lobe is relatively small, somewhat broader than long; the lateral margins are convex, the incision in the middle is broadest in front and tapers graduallv towards the base. The frontal prominences are inconspicuous and more dorsally situated than usual in Polynoids. The eyes are large and strongly pigmented; the two eyes on the same side
Size: 2094px × 1194px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectscientificexpedition
