描述 Rana margaretae sp. nov.
Tupe.—No. 49418 Chicago Natural History Museum, from panlungshan, Kwanhsien, Szechwan, 3,500 feet altitude. Adult male, collected june 20, 1941, by Ch'eng-chao Liu.
Diagnosis.—A mountain stream frog (pl. 6,fig.6) related to Rana andersonii; the male larger than in andersonii; the tympanum not broader than its distance from the eye; the fine white spines of the under side of the male limited to the anterior part of the belly in margaretae and much stronger and covering the whole belly in andersonii; on vocal sac in the male of margaretae, but vocal sacs present in andersonii. The much smaller Rana schmackeri has a feeble tarsal fold and a larger tympanum (three-fo urths the length of the eye),whereas margaretae has no trace of tarsal fold and the tympanum is about one-half the length of the eye.
Description of tgpe.—Body slender and depressed. Head greatly depr essed, much longer than broad, top flat with a small round white spot between the anterior parts of the upper eyelids; smout rounded, strongly projecting; mostril about midway between the tip of the snout and the anterior corner of the eye; canthus tostralis obtuse, loreal region oblique, with a groove from the mostril to the antero-ventral sode of the lower eyelid; interorbital space smaller than the internasal space and equal to the width of the upper eyelid;the space between eye and tympanum about equal to the size of the tympanum, which is about one-half the length of the eye; the tongue notched behind; the vonerine teeth very strong, in two slightly oblique series between the choanae.
Arm short but strong, fingers 3-4-2-1 in order of length; tips of fingers(fig.75,A) provided with rounded disks slifhrly larger than the diameter of the trtmenal phalanges, horizontal grooves distinct in the three outer fingers and indicated on the first finger; a very strong muptial pad on the inner dirsal side of the basal segment of the first finger, thetermin al segment of which is bent diwnward; subarticular tubercles stringly developed; supernumerary tubercles developed at the base of each of the three outer fingers; two elongated tubercles on the postero-ventral zide of each palm.
Legs strong and long, the tibio-tarsal articulation reaching the tip of the snout; heels strongly overlapping when placed at right angles to the body; the fourth toe (fig. 75,B) longest, the third and fifth about equal, the second toe shorter than the third and fifth, and the shortest; disks with horizontalgrooves devioped on all the toes; weds fully deceloped, reaching the bases of the disks on the inner side of the fifth toe, the outer sides of the fourth and third toes, both sides of the second toe and the outer side of the first toe; a narrow fringe along along the inner side of the first toe and the outer side of the fifth; sub-articular tubercles well developed; a very distinct elongate rod-like inner meta-tarsal tubercle; no outer metatarsal tubercle.
Skun smooth above, with a few flattened warts near the hip region; some small flattened warts on the side of the body and small light-colored spiny warts on the arms and legs; small white warts crowded on the postero-median aspects of the thighs, wspecially below the vent; the throat, belly and ventral sides of the limbs smooth,with very fine spines forming a definite transverse oval area on the thorax; a weak glandular fold from the posterior corner of the eye extending backward to the shoulder region.