. Fig. 10. Reconstruction of heart and aorta of Gigantocypris viewed from the sagittal plane. Fig. 12 is a continuation ventrally of this re- construction, aortic ganglion; aortic valve; anterior pericardium; cardiac neurone; point of exit of cardiac nerve from heart; hepatic valve; aortic muscle; branch of lateral subpericardial muscle running to hepatic valve; lateral subpericardial muscle; nauplius eye muscle; pericardial dilator; tube of parenchymatous tissue surrounding stomach which runs up to the hepatic valv

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. Fig. 10. Reconstruction of heart and aorta of Gigantocypris viewed from the sagittal plane. Fig. 12 is a continuation ventrally of this re- construction, aortic ganglion; aortic valve; anterior pericardium; cardiac neurone; point of exit of cardiac nerve from heart; hepatic valve; aortic muscle; branch of lateral subpericardial muscle running to hepatic valve; lateral subpericardial muscle; nauplius eye muscle; pericardial dilator; tube of parenchymatous tissue surrounding stomach which runs up to the hepatic valve.

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti