. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 292. Figure 1. Egg-laying in Scsanna haematoche ir and a method of measuring [he adhesiveness and plasticity of the egg envelope. (A) Morphology of the thorax (th) and abdomen (ah) of a female. Eggs just extruded from the gonopore (go) attach to many ovigerous hairs (see Fig. 6A) arranged on the ovigerous seta (os). No eggs adhere to the plumose setae (ps). m: month parts, vvl: walking leg. an: anus. (B) The incubation chamber, and an egg cluster newly extruded from the gonopore. The extruded eggs lie between thorax and abdo
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 292. Figure 1. Egg-laying in Scsanna haematoche ir and a method of measuring [he adhesiveness and plasticity of the egg envelope. (A) Morphology of the thorax (th) and abdomen (ah) of a female. Eggs just extruded from the gonopore (go) attach to many ovigerous hairs (see Fig. 6A) arranged on the ovigerous seta (os). No eggs adhere to the plumose setae (ps). m: month parts, vvl: walking leg. an: anus. (B) The incubation chamber, and an egg cluster newly extruded from the gonopore. The extruded eggs lie between thorax and abdomen (, incubation chamber), protected by the folded abdomen, and are incubated for nearly a month. The whole egg cluster is immersed in a transparent incubation fluid. Abbreviations are the same as in (A). (C) Eggs (eg) within 5 min after egg-laying. The egg envelope is not yet adhesive. (D) The eggs 20-30 min after egg-laying. The egg envelope (en) is adhering to the bottom of a petri dish. At this time, if an egg is gently rolled with a fine forceps, it moves a little, then it is slipped (or crushed) out of the envelope, a: one end of the envelope, where it adheres to the bottom of the petri dish (attachment point). </': the other end of the envelope where the egg was rolled or pushed with a forceps. The plasticity of the envelope was measured as the length of a-u' at this time. (E) The egg 40 min after egg-laying. The envelope (en) showed both adhesiveness and plasticity. (F) The eggs 90 min after egg-laying. Adhesiveness of the envelope (en I was lost, so the envelope did not adhere to the petri dish. But the envelope attained maximum plasticitv. hairs (Fig. 3C); when clusters of embryos were pulled away from the ovigerous seta with fine forceps, most of the hairs broke away from the seta (not shown: see Saigusa, 1995). Investment cunt. When cross and oblique sections of the attachment were examined (Fig. 4A), it was always sublayer Ela that was seen to adhere direct
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
