. Journal of morphology. ION OF FIGURES 10 The point of union between the epithelium of the foie-and mid-guts. of the mid-gut; , glandular appearing epithelium of the fore-gut. 11 Fore- and mid-guts of the pupa just after pupation. In this case the intimaof the gizzard remained lodged in the anterior end of the oesophagus. 12 Cross-section of the proventriculus of the fore-gut showing the four promi-nent chitinous ridges which project into the mid-gut. 13 Cross-section of the fore-gut of a pupa about twenty-four hours old ,longitudinal muscles; cm., circular muscles;/6.
. Journal of morphology. ION OF FIGURES 10 The point of union between the epithelium of the foie-and mid-guts. of the mid-gut; , glandular appearing epithelium of the fore-gut. 11 Fore- and mid-guts of the pupa just after pupation. In this case the intimaof the gizzard remained lodged in the anterior end of the oesophagus. 12 Cross-section of the proventriculus of the fore-gut showing the four promi-nent chitinous ridges which project into the mid-gut. 13 Cross-section of the fore-gut of a pupa about twenty-four hours old ,longitudinal muscles; cm., circular muscles;/6., remnants of the breaking downmuscle fibrillae; .r, degenerating nuclei. Within the lumen lies the loosened intima. 14 A more highh magnified section of the epithelium of figure 13 to show thedegenerating nuclei (x). 15 A lateral view of the muscles of the pharynx, showing the dorsal muscles inplace. 16 Ventral view of the pharynx showing the lateral muscles. 618 FORE-GUT OF CORYDALIS CORNUTUS L. ROBERT MATHESON PLATE 2. ()19 PLATE 3 EXPLANATION OF FIGURES 17 Cross-section of tlie wall of the larval fore-gut to show the strucduc of theepithelium and muscles. The following series of photographs are all taken atabout the same point to show the series of changes in the epithelium and musclesduring metamorphosis. 18 Cross-section of intestinal wall of a prepupa showing the eai-liest changesin the epithelium and muscles. 19 Cross-section from the same region as figure 18 from a prepupa in which theintima has been cast off. 20 Cross-section of the intestine of a young i)upa. The nuclei of the musclesare now much more prominent and the pupal epithelium has secreted a new intima. 21 From a i)ui)a about twenty-four hours old. Note the degeneration of themuscles, only a densely staining mass of fibrillae remaining. The epithelium hasbecome much enlarged and vacuolate. 22 From a pupa ninety-six hours after pupation. The ])npal intima has justbeen shed; x, degenerating nuclei. Note the em
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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912
