The comparative times required for similar lobster eggs already slightly developed, to reach the 16-cell stage, at 18.5, 14.4, 12.3, 10.5, 9.9, and 4.7 °C. are 2, 3, 3.6, 4.8, 5.6 and 25 days respectively.Egg-laying is almost a month later at Grand Manan than in the warmer southern gulf of St. Lawrence areas. Egg-laying in the southern part of the gulf of St. Lawrence takes place in two bursts, the first being egg-laying by old-shelled lobsters usually occurring in the latter half of June and in July, and the second, egg-laying by new-shelled lobsters occurring mainly in August in the warmest areas.Female lobsters rarely lay eggs before becoming hard-shelled. Development of the lobster egg usually requires 11½ to 12 months in Canadian waters.