. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 76. Fig. 77. Anatomical description: The ectoderm of the scapus is high, thicker than the mesogloea and contains nematocysts, 29—34 (37) X 7—8 /i in size, often somewhat curved, and large, very numerous gland-ceUs. The nematocysts are packed together in greater and smaller groups; there are, however, also a few nematocysts between the groups. The ectoderm of the capitulum is in the longitudinal ridges very high (textfig. 79), a Uttle thicker than the mesogloea, but in the furrows thinner. In the ectoderm of the ridges t
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 76. Fig. 77. Anatomical description: The ectoderm of the scapus is high, thicker than the mesogloea and contains nematocysts, 29—34 (37) X 7—8 /i in size, often somewhat curved, and large, very numerous gland-ceUs. The nematocysts are packed together in greater and smaller groups; there are, however, also a few nematocysts between the groups. The ectoderm of the capitulum is in the longitudinal ridges very high (textfig. 79), a Uttle thicker than the mesogloea, but in the furrows thinner. In the ectoderm of the ridges there are numerous nematocysts, 26—46 ^ long and almost 7 fi broad, often a little curved, while the ecto- derm of the furrows does not contain any such. The mesogloea is thickened in the ridges. The ectoderm of the tentacles is provided with very numerous, smaller nema- tocysts (18—24 X 5 /i) and some few, a little larger (27 X 7 /i). The spirocysts are of variable size, the largest about 24 ji long. The ectoderm of the actino- / pharynx is high in the ridges as on the capitulum; in the furrows thinner and provided Pig yg with numerous, granulate 76 gland-cells. Mainly in the rid- Transverse section through a portion of scapus in the repro- S^s typical nematocysts are ductive tract. Figs. 77—78- found (17—20 X 3//) and some Transverse sections of pennons in the reproductive tract. Fig. such with distinct basal part 79. Transverse section of a por- ^^ ^^^ -^^ ^-^^^^^ ^^^^ ^ ^^^1^ tion of the capitulum, n: ne- matocysts, me: mesentery. broader in the basal end (22— 29x5,^. In the probably differentiated siphonogljrphe the gland-cells and spirocysts are few in numbers. The imperfect mesenteries in the most distal part of the body are considerably weaker than in M. loveni. The perfect, well-developed mesenteries are as usual in the Edwardsiidae 8 in number, in a spec- imen I have, however, found only 7 stronger mesenteries and 7 ridges in t
Size: 2738px × 913px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectscienti, bookyear1921
