(fo D. M.S. Watson—Eugyrinus wildi. 
¢ 
is a distinct flange from the pterygoid supporting the inner surface 
of the lower jaw as in Lvyops. 
The interpterygoid varieties are large, but the width of the 
palatine and pterygoid is considerable, the pterygoid in consequence 
passing far forward. 
On the dorsal surface the hinder margin of the skull is formed by 
the small tabulars, which have rounded ends, and are not produced 
into horns, and by the considerably larger dermo-supraoccipitals. 
Both these pairs of bones have large descending flanges on the 
occipital surface, which, as in the later Labyrinthodonta, must have 
covered the paroccipitals and exoccipitals. The parietals are large 
bones, succeeded in order by the frontals and nasals. There is a 
large supratemporal, which articulates with the tabular, dermo- 
supraoccipital, and parietal on the admesian border, with the 
postfrontal and postorbital in front and with the squamosal 
laterally. Its border enters into the margin of the large otic notch. 
The squamosal lies on the side of the skull, articulating above with 
the supratemporal. Its caudal margin is turned in under the otic 
notch to be attached to the upper edge of the paraotic plate of the 
pterygoid. Ventrally of this union the bone covers part of the 
hinder surface of the well-ossified quadrate. There is a small 
quadratojugal. The series of circumorbital bones is complete, 
the lachrymal extending from the orbit to the nostril as in primitive 
reptiles. Owing to the large size of the orbit, the lachrymal and 
jugal do not meet. The structure of the lower jaw is undeterminable. 
The vertebral column is largely concealed by the body squamation, 
but such parts of the neural arches as are visible agree exactly 
with those of Branchiosaurus, and present no resemblance to any 
Lepospondyl elements. The ribs of the pectoral region are as 
described by Smith Woodward, very stout, straight, and expanded 
at both ends; the later dorsal and caudal ribs, though more slender, 
are equally straight. Of the shoulder-girdle the interclavicle is as 
shown in the original description, a rounded plate of bone with a 
distinct radiating ornament. Fragmentary remains of clavicles of 
a scapula and perhaps ofa cleithrum are shown; they agree with the 
corresponding elements of Branchiosaurus. In the pelvis the long, 
slender ilium and plate-like ischium are well shown from their 
visceral surface, but there is no trace of a pubis. 
There is a complete covering of scales on both ventral and dorsal 
surfaces. On the belly these have a complex arrangement, not 
describable in detail but recalling that of Branchiosaurus. 
The amphibian just described is clearly a Branchiosaur. Only 
in the Phyllospondyli amongst Paleozoic amphibia do comparable 
vertebre, ribs, and squamation occur. Itis the oldest known member 
of its order, Humicrerpeton, Mazonerpeton, and Micrerpeton, described 
by Moodie from the Coal-measures of the United States, coming from 
the considerably higher horizon of Mazon Creek. The other Huropean 
forms come from Stephanian and Artinskian rocks, and from different 
