. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 5- Fig. 6. 9. Tromikosoma Koehleri n. g., n. sp. PI. XI Figs, 2, 13. PI. XII. Figs. 22, 31, 41. PI. XIV. Figs. 12, 16, 19, 21, 23, 25, 28, 30. Of this species we have only one very large specimen, i8omm in diameter, from st. 36 (61- 50' N. Lat. 56°2i'W. L. 1435 fathoms, bottom temperature 2°), the Davis Strait. Unfortunately it is very badly preserved, so that the description cannot be complete, and no figure can be given of the whole animal. So many characters may, however, be distinguished in the animal before us, tha
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 5- Fig. 6. 9. Tromikosoma Koehleri n. g., n. sp. PI. XI Figs, 2, 13. PI. XII. Figs. 22, 31, 41. PI. XIV. Figs. 12, 16, 19, 21, 23, 25, 28, 30. Of this species we have only one very large specimen, i8omm in diameter, from st. 36 (61- 50' N. Lat. 56°2i'W. L. 1435 fathoms, bottom temperature 2°), the Davis Strait. Unfortunately it is very badly preserved, so that the description cannot be complete, and no figure can be given of the whole animal. So many characters may, however, be distinguished in the animal before us, that genus and species can be recognised with certainty. — With regard to the generic characters see above p. 64—65. The structure of the test cannot be described completely, as the whole actinal side is torn; the abactinal side, on the other hand, is whole, and permits an examination of the form of the plates (Figs. 5—6). The ambulacral areas (Fig. 5) are uncommonly broad, a little broader than the inter- ambulacral areas. The primary ambulacral plates are angularly bent, with their top turned towards the ambitus; the outer half is a litte narrower than the inner one. The secondary ambulacral plates are Piece of ambulacral and iuterambulacral area of Tromiko- soma Koehleri p/i). in the animal the boundaries between particularly well developed, especially the outer one the plates are white, the plates of a bluish gray. ^^ reaches quite tO the edge of the ambulacral area. Near the apical area the inner accessory ambulacral plate reaches quite to the median line where it adjoins the point of the primary ambulacral plate from the opposite side. Thus the primary ambulacral plates of the same side are here quite separated. The pores of the accessor)- plates are situated near the boundary line between the plates, the pore of the primary ambulacral plate is placed about under that of the inner accessory plate. Also the interambulacral plates are angularly bent, but in a direction
Size: 1857px × 1346px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscienti, bookyear1903
