INFLUENCE OF THE SINUSGLAND OF CRUSTACEANS ON NORMAL VIABILITY AND ECDYSIS

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Abstract
A technique for dissecting out the sinus gland of crayfishes was developed. By means of extirpation and implantation expts. it was demonstrated that the sinus gland of the eye-stalk of the crayfish was essential for normal viability of the animal. Animals with both glands removed lived a significantly shorter time than normal animals, and furthermore the avg. post-operational life of these animals with glands removed could be lengthened by both homo- and heteroplastic implants of sinus gland tissue. Additional evidence strongly suggested that the sinus gland normally secreted a substance having a molt-inhibiting action. This evidence for molt control was derived from the same types of expts. that showed the effect of the sinus gland upon viability.

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