James Duncan,
The Naturalist's Library
(1840)
“ The changes which the alimentary substances undergo in the part of the canal behind the insertion of the vessels just spoken of, depends in some measure on its length. When very short the chyme contained in it affords no chyle, as may be observed in caterpillars; but when of great length, there is no doubt that the chyme is further elaborated, and chyle separated, just as it was in the chylific ventricle. It is scarcely possible that the small egg-shaped ventricle of the Lepidoptera could separate all the chyle necessary for the support of life, unless aided by the long intestine ”
