卵结茧、结茧羽化两阶段的发育速率与温度均呈直线关系，发育起点温度分别为10.6和11.8℃，有效积温常数分别为105.6和62.0日度。
The development zeros and thermal constants of the two developmental stages were determined as 10 . 6 and 11 . 8 C , and 105 . 6 and 62 . 0 day degrees , respectively .
蚯蚓的卵是包在茧里的。
The ova of earthworms are contained in cocoons .
卵茧