Foulley M M, Mellinger J
Reprod Nutr Dev (1980). 1980;20(6):1835-48.
The eggs of the small spotted dogfish (Scyliorhinus canicula), developed in artificial sea water at 14 degrees C, pre-hatched after 3 to 3 1/2 months (total embryo length: 31 to 38 mm). Hatching occurred after 6 1/2 to 7 1/2 months (length of newborn: 80 to 95 mm). Egg weight first increased for 12 days and then remained constant until pre-hatching. A biometric study of the whole egg, egg case and albumen chamber showed very little variation in egg width, while egg length varied widely. As laying occurs in pairs, the secretory activity in each nidamental gland was observed to adapt to the extra volume of egg case contents in two cases where a double egg was laid with a normal one. However, the size and shape of the normal eggs of each female were generally distinctive, regardless of the contents or the external conditions. The egg case wall had three separate layers, as shown by microscopy of fresh material and experimental studies with various dyes.
小斑星鲨（Scyliorhinus canicula）的卵在14摄氏度的人工海水中发育，在3至3个半月后（胚胎总长度：31至38毫米）提前孵化。在6个半月至7个半月后（新生幼体长度：80至95毫米）孵化。卵的重量在最初12天增加，然后在预孵化前保持恒定。对整个卵、卵壳和蛋白腔的生物测量研究表明，卵宽变化很小，而卵长变化很大。由于卵是成对产出的，在两枚双卵与一枚正常卵一起产出的两种情况下，观察到每个缠卵腺的分泌活动会适应卵壳内容物额外的体积。然而，无论卵的内容物或外部条件如何，每个雌性的正常卵的大小和形状通常都是独特的。通过新鲜材料的显微镜检查和用各种染料进行的实验研究表明，卵壳壁有三层独立的结构。
