The alligator and its allies

One of the older textbooks (Claus and Sedgwick) divides the order Crocodilia into three sub-orders: the _Teleosauria_, _Steneosauria_, and _Procœlia_, the last only being repres...

The _epidermal skeleton_ of the alligator consists of oblong horny scales, arranged in transverse rows; the long axes of the scales are parallel to that of the body. On the tail...

The description of the muscles here given is taken from Bronn (11), who, in turn, largely follows Gadow. The animal described is the crocodile, but while Bronn does not indicate...

The spinal cord extends the whole length of the vertebral canal and ends near the end of the tail as a thin, round thread. It varies in thickness and shape in cross section, bei...

The _mouth_ in the Crocodilia is large, as is well known, and may be opened very wide. It is bounded anteriorly and laterally by the teeth of the two jaws; these teeth were desc...

The urogenital organs in the young animal are so similar in the two sexes that one might easily be mistaken for the other; of course in sexually mature animals, especially durin...

_The Larynx and Trachea._ In the Crocodilia the framework of the larynx consists of three cartilages, of which two represent the arytenoids of the Mammalia; the third represents...

The account given by Bronn in his _Thierreich_ is apparently the only published description of the circulatory organs in the Crocodilia. This account, even when translated, is n...

With the exception of S. F. Clarke’s well-known paper, to which frequent reference will be made, practically no work has been done upon the development of the American alligator...