Alveolar margins of the maxillæ serrated, the spiculæ pointing backwards towards the œsophagus. The œsophagus very large, like that of the serpents, gradually expanding as it descends to form the stomach, which again contracts at the commencement of the intestinal tube; the lining membrane of the œsophagus and stomach, thrown into longitudinal folds, which were continued throughout the intestines; which tube undergoes several enlargements in its course, giving it a sacculated appearance similar to the alimentary canal of the alligator; in the animal under consideration, they form several convolutions previous to their termination into the cloaca; the stomach contained an earth worm. The mesentery transparent, displaying a number of very large lacteals, which, in the present instance, were filled with coagulated chyle. Length of the intestines 10 inches. The ovary is of considerable size, of an oblong figure, lying close to the vertebræ, and opening by a straight duct into the posterior part of the cloaca. _Liver_ very large, and apparently (but not certainly) discharged its contents into the stomach. _Lungs_ consist of two long membranous bags, which run the whole length of the abdomen, anteriorly to the stomach and intestines; the opening of the larynx scarcely large enough to admit a pin's head; the lungs resemble two long air-bags, more than a true pulmonary apparatus; the cartilaginous laminæ of the branchia, three in number, attached superiorly to the integuments over the cervical vertebræ, converging together beneath or anteriorly, and are attached to a cartilage answering to the os hyoides; the heart, which was extremely small, consisted apparently of one auricle and one ventricle, the aorta soon bifurcated, sending one branch to each pulmonary apparatus to be intimately ramified upon the branchia, resembling so far the circulation of fishes, and differing from the amphibia, in which there is either a double or mixed circulation.