x 4.]

[Illustration: FIG. 9. _Hesperoherpeton garnettense_ Peabody. Right
scapulocoracoid in external view, showing part of interclavicle, and
position occupied by clavicle. The specimen is flattened and lies
entirely in one plane. KU 10295, x 4.]

[Illustration: FIG. 10. _Hesperoherpeton garnettense_ Peabody. Right
clavicle in external view. Anterior edge to right. KU 10295, x 4.]

The right clavicle is complete, and resembles a spoon having a slender
handle. The dorsal tip of the handle is L-shaped. The expanded ventral
part is convex externally, and rested upon the anteroventral surface of
the scapulocoracoid. The lateral edge next to the "stem" is distinctly
concave, abruptly becoming similar in contour to the opposite edge, and
giving the impression of an unsymmetrical spoon. The left clavicle is
present in scattered fragments, its dorsal hooklike end being intact.

The posterior end of the interclavicle lies in contact with the right
scapulocoracoid. There are short lateral processes at the point where
the interclavicle was overlapped by the clavicles, but we cannot be
sure of the extent of this bone anteriorly or posteriorly.

The presumed left cleithrum, a long rectangle, is approximately equal
in length to the rodlike stem of the clavicle, and is about as wide as
the dorsal L-shaped tip of the clavicle. The posterior end of the
cleithrum presumably met the tip of the clavicle, while the rest of it
was directed anteriorly and a little dorsally. There seems to be a
small articular surface near the anterior extremity which suggests the
presence of a supracleithrum. The upper border of the cleithrum is
slightly convex and the lower concave.

FORELIMB (Fig. 11)

The left forelimb is the only one present and appears to be nearly
complete, although the elements are scattered almost at random. The
only parts of the forelimb known to be missing are two subterminal and
two terminal phalanges, probably of the first and third digits, and the
proximal end of the second metacarpal. The smooth and relatively flat
surfaces suggest an aquatic rather than terrestrial limb; only the
proximal half of the humerus bears any conspicuous ridges or
depressions. As we restore the skeleton of the limb, several features
are remarkable: The humerus, ulna, and ulnare align themselves as the
major axis of the limb, each carrying on its posterior edge a process
or flange comparable to those in the axial series of a rhipidistian