. The development of the chick; an introduction to embryology . ntact with the posterior face of the the posterior wall of the infundibulum in its rise, wecome to a slight elevation, the rudiment of the mammillarytubercles; just beyond this is a transverse commissure (the in-ferior commissure); and the diencephalon ends at the tuberculumposterius. The hypophysis has become metamorphosed into a mass oftubules enclosed within a mesenchymatous sheath; the stalk iscontinuous with a central tubule representing the original cavityfrom which the other tubules have branched out (F
. The development of the chick; an introduction to embryology . ntact with the posterior face of the the posterior wall of the infundibulum in its rise, wecome to a slight elevation, the rudiment of the mammillarytubercles; just beyond this is a transverse commissure (the in-ferior commissure); and the diencephalon ends at the tuberculumposterius. The hypophysis has become metamorphosed into a mass oftubules enclosed within a mesenchymatous sheath; the stalk iscontinuous with a central tubule representing the original cavityfrom which the other tubules have branched out (Fig. 148), andit may be followed to the oral epithelium from Avhich the wholestructure originally arose. The lateral walls of the diencej^halon have become immenselythickened, both dorsally and ventrally, and a deep fissure () is found on the inner face at the anterior end, between thedorsal and ventral thickenings. The deepest part of the fissureis a sliort distance behind the velum transversum; from this a 2r>{) TIIK DEVELOPMENT OF THE CHICK £
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Keywords: ., bookcentury1900, bookdecade1900, bookiddevelopm, booksubjectbirds
