An effigy in the form of an alligator occurs near Granville, Licking county, Ohio, upon a high hill or headland; in connection with which there are unmistakable evidences of an altar, similar to that in conjunction with the work just named. It is known in the vicinity as "the Alligator," which designation has been adopted for want of a better, although the figure bears as close a resemblance to the lizard as any other reptile. It is placed transversly to the point of land on which it occurs, the head pointing to the south-west. The total length from the point of the nose following the curve of the tail to the tip is about two hundred and fifty feet, the breadth of the body forty feet, and the length of the feet or paws each thirty-six feet. The ends of the paws are a little broader than the remaining portions of the same, as if the spread of the toes had been originally indicated. Some parts of the body are more elevated than others, an attempt having evidently been made to preserve the proportions of the object copied. The outline of the figure is clearly defined; its average height is not less than four feet; at the shoulders it is six feet in altitude. Upon the inner side of the effigy is an elevated circular space covered with stones which have been much burned. This has been denominated an altar. It seems more than probable that this singular effigy, like that last described, had its origin in the superstition of its makers. It was perhaps the high place where sacrifices were made on stated or extraordinary occasions, and where the ancient people gathered to celebrate the rites of their unknown worship. Its position and all the circumstances attending it certainly favour such a conclusion. The same is true of a work in the form of a cross, occupying a like situation near the village of Tarlton, Pickaway County, Ohio. From these premises, we are certainly justified in concluding that these several effigies had probably a cognate design, possessed a symbolical significance, and were conspicuous objects of religious regard, and that on certain occasions sacrifices were made on the altars within or near them. The only structures sustaining any analogy to these are found in Wisconsin and the extreme North-west. There we find great numbers of mounds bearing the forms of animals of various kinds, and entering into a great variety of combinations with each other, and with conical mounds and lines of embankments, which are also abundant. They are usually found on the low, level, or undulating prairies, and seldom in such conspicuous positions as those discovered in Ohio. Whether they were built by the same people with the latter, and had a common design and purpose, it is not undertaken to say, nor is it a question into which we propose to enter. It is an interesting fact that amongst the animal effigies of Wisconsin, structures in the form of serpents are of frequent occurrence.