. The coal measures Amphibia of North America. Amphibians, Fossil; Paleontology; Paleontology. THE MICROSAURIAN FAMILY SAUROPLELK 11 > 1 . 159 ( ope referred to 5. scutellata the larger pari of an individual with trongly developed ventral scutellation. This he figured on plate xxxvi, fig. 2 Even a cursory glance will, however, suffice to show that the sculpturing of the clavicle just described and that exhibited by the specimen there figured arc identical. Closer examination shows important differences between the species, the principal distinctions being the strongly developed ventral scut
. The coal measures Amphibia of North America. Amphibians, Fossil; Paleontology; Paleontology. THE MICROSAURIAN FAMILY SAUROPLELK 11 > 1 . 159 ( ope referred to 5. scutellata the larger pari of an individual with trongly developed ventral scutellation. This he figured on plate xxxvi, fig. 2 Even a cursory glance will, however, suffice to show that the sculpturing of the clavicle just described and that exhibited by the specimen there figured arc identical. Closer examination shows important differences between the species, the principal distinctions being the strongly developed ventral scutellae in Sauropleura scutellata, the difference in form and sculpture of the interclavicles, and the posterior extension of the interclavicle in S. scutellata which is wanting in 5. pauciradiata. The sculp- turing of the interclavicle in the form figured by Cope as S. scutellata, just referred to, is identical with the sculpture f the clavicles, as would be expected. The ridges on all of the pectoral elements of 5. pauciradiata are strong and are rather few in number, while in S. scutellata the sculpturing is more in the form of interrupted grooves. The specimen (plate 14, fig. 3) exhibits the great part of the body with one fore limb. The skull is wanting. The belly was very broad and strongly protected by broad, long scutes arranged en chevron. The scutes are close together and form a compact ventral armor for the animal. The fore limb is very weak. The humerus is represented by its distal end only. The radius and ulna are very short and weakly developed in comparison to the size of the animal. The limbs could not have sup- pi irted the animal on land and served, probably, merely as organs of equilibration, for the animal was undoubtedly aquatic. The fingers are not all preserved and there is no carpus. Numerous other remains formerly associated with S. scutellata are here referred to S. pauci- radiata, on account of the strongly developed ventral armor, which is different fr
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