. Journal of anatomy. ccalis is somewhatmore compact, its tubules being closely pressed together. In this stagefor the fiist time chromophilic cells can be identified in the pars are very brightly stained, and are most numerous in the posteriorregion. The lateral wings of the proximal lobe are slightly less branched thanin the preceding stage. The infundibular process is small relatively to the size and advanced 222 Dr Katharine M. Parker condition of the pars buccalis. It forms a simple, thin-walled diverticulumwith a somewhat constricted neck. It is not possible to identify See
. Journal of anatomy. ccalis is somewhatmore compact, its tubules being closely pressed together. In this stagefor the fiist time chromophilic cells can be identified in the pars are very brightly stained, and are most numerous in the posteriorregion. The lateral wings of the proximal lobe are slightly less branched thanin the preceding stage. The infundibular process is small relatively to the size and advanced 222 Dr Katharine M. Parker condition of the pars buccalis. It forms a simple, thin-walled diverticulumwith a somewhat constricted neck. It is not possible to identify Seessels pocket with absolute certaintyin this stage. A small, flattened structure, closely resembling Seesselspocket in other embryos, is present, but is in such close relation to theproximal lobe that it is impossible to draw an absolute distinction betweenthe two structures. Stage XI. PoucJl foetus 24 onm., 11-5 mm.—The hypophysishas increased markedly in size. The tissue of the pars distalis has un- J- ^^. Fig. 38.—Stage X. Phaseolarctos cinereus { 115 mm.). Transversesection through pars distalis. SI. 10-1-3. ex., connective tissue ; , chromophilic cells ; L., lumen ; , parsinfundibularis ; , Seessels pocket. fortunately shrunk away somewhat from the connective tissue, which nowforms an interlacing network penetrating throughout the substance of thepars distalis. The appearance of compactness is accordingly destroyed. The pars distalis consists of numerous rounded lobules, all of whichhave now lost their lumina. The cells are very clearly differentiated intochromophilic () and chromophobic types, the former showing up asclear bright-red patches in the tissue (represented black in figures). The pars tuberalis forms a collection of branched tubules lying betweenthe body of the pars distalis and the diencephalic floor anterior to theinfundibular process. It is still connected by a cell cord with the ventralside of the pars buccalis. The Devel
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
