On the Early Development of Porrocaecum decipiens

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Abstract
Eggs of P. decipiens, a marine ascarid of seals, were kept in sea water at 3 temperatures. Development at 2[degree] to 4[degree]C was very slow and no larval movements within the egg were observed during the 27 days of the experiments. At 13[degree] to 14[degree] C, the eggs hatched after 13 to 14 days. The larvae, although very active, remained enclosed in the moulted 1st-stage cuticles for the remaining 13 days of the experiments. Hatching occurred after 8 to 9 days at 17[degree] to 25[degree]C, but after hatching all the larvae died almost immediately. It was concluded that the eggs of P. decipiens can hatch in sea water, and that entry into some host is necessary before the 1st cuticle can be dissolved.

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