2. A restoration, natural size, of the branchiosaurian, Mazonerpeton, based on two specimens. The form of the animal is quite salamander-like. It is shown when about to feed on a specimen of Acanthotelson stimpsoni, which is said to be a brackish-water crustacean. The branchiosaur and crustacean may possibly have inhabited the same body of water.
The pectoral girdle is represented by two elements, one of which is certainly the right clavicle, and the other is possibly the left clavicle, though its form is somewhat distorted by pressure. Both elements are in the form of an elongate spatula with the dorsal surface greatly concave and the inner end acuminate.
The right humerus is imperfectly preserved, though the impression allows one to gain an exact idea of its form. It lies under the right clavicle. Its ends are truncate with a contracted shaft and expanded extremities; the bone was apparently hollow.
Fig. 15.
A. Impression of Erierpeton branchialis Moodie. bb, basibranchial; hyp, hypohyals; m, mandible; d, body impression. × 3.
B. Eumicrerpeton parvum Moodie. a, anus; f, femur; h, humerus; in, intestine; l, liver; st, stomach; r, radius; u, ulna. × 3.3.
C. Larger specimen of Eumicrerpeton parvum Moodie. a, anus; d, dorsal lateral-line; h, humerus; in, intestine; ml, median lateral-line; st, stomach. × 2.6.