Abstract
Before the Laboratory of the Association was built, it had often been observed in other aquaria that female conger after living for some time in captivity, feeding regularly and voraciously, and growing with considerable rapidity, passed into a swollen and apparently gravid condition and then died. Such conger when dissected after death were invariably found to contain enormously developed ovaries or roes, which entirely filled up and distended the abdominal cavity, and pressed the intestine and other abdominal organs into as small a space as possible. The following are the principal records of cases in which this has been observed.

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