. Den Norske Nordhavs-expedition, 1876-1878. Scientific expeditions; Marine animals -- Norwegian Sea; Marine animals -- Arctic regions; Norwegian Sea. 17 lidet lulviklede Gonoferer 02; de irit svoniinonde INIeduser. Nedenstiineiulc Træsnit (Fig. 2) viser schoniatisk Gono- forernes forskjellige Udvikliiig hos Arter af denne Familie. can i>e hetter denionstrated here thaii7in any otiier faniily. Fig. 2, below, is a dia;j;rani showing the different forms of development in diflerent species of this family. Fiir. â -'.. Schematisk fremstilling at Gonofdrerne inden Fam. 'Tiibiilai-idæ. a, Stylo
. Den Norske Nordhavs-expedition, 1876-1878. Scientific expeditions; Marine animals -- Norwegian Sea; Marine animals -- Arctic regions; Norwegian Sea. 17 lidet lulviklede Gonoferer 02; de irit svoniinonde INIeduser. Nedenstiineiulc Træsnit (Fig. 2) viser schoniatisk Gono- forernes forskjellige Udvikliiig hos Arter af denne Familie. can i>e hetter denionstrated here thaii7in any otiier faniily. Fig. 2, below, is a dia;j;rani showing the different forms of development in diflerent species of this family. Fiir. â -'.. Schematisk fremstilling at Gonofdrerne inden Fam. 'Tiibiilai-idæ. a, Styloid Gon. (G-ymuog. cvassicornis); h, Anlæg af 'Glk' (fællcs for Medusoide orr Pseudomedusoide Gon.); c,d,d' Pseudoined. Gonnfor (Lampra), (f, Udviklingsstadium; d, fuldt iidviklet Gonofor; rf', Tver- snit af samme); eâi Medusoide Gonoforer; (e, udv. Stad ; /, fuldt ud- viklede Gonoforer; /' og /", Tvcrsnit af Gonoforer uden og med Radialkanaler; g, Gonofor med fuldst. Kanakystem), â Overgangs- stad, til /(, fastsiddende, â eller til i, fri Meduse). Diagram of tlie gonophores in fam. Tuhularidae. a, Sti/loid gonophorc (Gymnog. crassicornis); b, rudiment of 'Glk' (common to medusoid and pseudo-mediisoid gonophores); c, d, d', pseudo-medusoid gonopliore (Lampra); (c, developmental stage, d, fuUy-developed gono- pliore, (/', transverse seotion of the same); câi, medusoid gonojihores; (e, developmental stage, /, fully-developed gonophore, f, f", trans- verse seotion of gonophore without and with radial canals; g, gono- phore Vi'ith complete canal system, â transition to li, fixed, â or i, free-siriiiuiiiiig medusd). Gi/mnogoiios crassicorms (29) viser det aller enkleste Forhold (Styloide Gonoforer), idet Gouoforcriic her kun bestaar i en simpel Udhugtning af Hydrantheiis to Lag, og Generationsstofferne ligger her i Ektodermen, kun be- skyttet af et enkelt Lag af dennes Celler. Ingen andre af de hidtil kjeudte Arter bliver staa- ende paa dette Stadium, men f
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscientificexpedition
