The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . •M 2882 THE PINEAL BODY 63 The development of the epiphyseal complex in Ophidia, Chelonia,and Crocodilia. The embryonic description which holds goodfor the more primitive forms of reptiles must be much modifiedin dealing with the more highly organized and modern forms ofthis class. Hoffmann186 showed that in these reptiles the anlageof the epiphyseal complex is laid down as a sing
The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . •M 2882 THE PINEAL BODY 63 The development of the epiphyseal complex in Ophidia, Chelonia,and Crocodilia. The embryonic description which holds goodfor the more primitive forms of reptiles must be much modifiedin dealing with the more highly organized and modern forms ofthis class. Hoffmann186 showed that in these reptiles the anlageof the epiphyseal complex is laid down as a single evagination. Fig. 29 The epiphyseal complex in Tropidonotus natrix, according to Stud-nicka, 1893. Pf., paraphysis; Ds., dorsal sac; commissura habenularis; Ep., proximalportion of pineal organ; R., recessus pinealis. Cp., commissura posterior; M.,midbrain. from the roof-plate immediately anterior to the posterior com-missure. This hollow evagination is ultimately transformedinto a solid body. Such a transformation has been shown byLeydig240 and Studnicka389 in Tropidonotus (figs. 29 and 30). Fig. 27 The epiphyseal complex in a 31 mm. embryo of Gehyra oceanica, ac-cording to Stemmler, 1900. Pf., paraphysis; V., velum transversum; Ds., dorsal sac; Ch., commissurahabenularis; Ep., pineal organ; Cp., posterior commissure; M., midbrain. Fig. 28 The epiphyseal complex in a 33 mm. embryo of Platydactylus muralis,according to Melchers, 1899. Pf., paraphysis; Ds., dorsal sac; Ch., commissura habenularis; Ep., pinealorgan; Sch., pars intercalaris posterior; M, midbrain. 04 FREDERICK TILXEY AND LUTHER
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