. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. STOMACH AND INTESTINE. 353 statement excludes the possibility of a net- work, such as has been affiimcd to exist by Knuise and others. Koelliker, in whose ad- mirable work * the reader will find a copious analysis of the latest observations on this subject, sums them all up very impartially by acknowledging, that, although he has never been able to see a trace of such ramifications, still he cannot venture altogether to deny their existence. On the contrary, he thinks it pos- sible that the above simple mode of commence-
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. STOMACH AND INTESTINE. 353 statement excludes the possibility of a net- work, such as has been affiimcd to exist by Knuise and others. Koelliker, in whose ad- mirable work * the reader will find a copious analysis of the latest observations on this subject, sums them all up very impartially by acknowledging, that, although he has never been able to see a trace of such ramifications, still he cannot venture altogether to deny their existence. On the contrary, he thinks it pos- sible that the above simple mode of commence- ment,— which certainly holds good for the cy- lindrical villi,— maj be exchanged, in the larger of these processes, for one involving the pre- sence of a greater number of lacteal canals, or the absence of such blind extremities. But in conceding this much, Koelliker points out —what Valentin f seems previ- ously to have suspected, — the facility with which a striated arrangement of the dark fatty molecules within the chyliferous villus may be mistaken for lacteal vessels. Nay more, even the chyle of the central canal sometimes separates by coagulation into striae, which closely imitate a branched network. We may add, that, in the various observations which have been made on executed criminals, the possibility of error has probably been in- creased by the distended state of the vascular and lacteal canals contained within the delicate structure of the villus. Whatever be the case as regards these conjectures, it seems to me that the large simple tube, and the minute network, are far too unlike to be regarded as mere degrees of development of the same structure in differ- ent villi. In like manner, the simple loop of lacteal seen by Henle just beneath the base- ment membrane is suspicious, not only from its situation, but also from a fact noticed by Valentin and Remak, — that the central canal sometimes coexists with it. And when we add to the foregoing remarks, that
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