The call is a quiet low trill or series of staccato whistles rising slightly at the beginning; a short peeplike note also was heard. The specimens from Cheju Do, which are generally smaller than those collected on the mainland in spring, were taken on September 6 in a small stream that had large volcanic rocks in many places and that was flanked by thick brush and small trees. The earliest and latest dates on which _B. orientalis_ was collected were April 21 and September 6, respectively. In the breeding season, males are distinguished from females by the large blackish (probably brownish earlier in season) areas on the anteroventral surface of the antebrachium, the metacarpal tubercle, and the inner surface of the first finger (sometimes also the second and third). Also, males have conspicuous black-tipped tubercles on the back (usually absent in females) that extend onto the limbs (usually smooth in females, at least laterally). Field observations by one of us (Byers) suggested that the dorsal pattern of males had greater contrast than that of females and that the venter was brighter reddish. Eight females from Tangjonggok averaged 47.9 (43-51) in snout-vent length, whereas 24 males from there averaged 50.0 (46-55), indicating little, if any, size difference between the sexes. Okada (1931:29) recorded variation in color of live Korean individuals (green or brown dorsally and pale yellow or red ventrally) and variation in extent of black markings on the belly (_op. cit._:fig. 12). The specimens from Cheju Do (28, 32, 32, 32, 37 and 46 in snout-vent length) have less black ventrally than specimens from the mainland. =Bufo bufo gargarizans= Cantor _Bufo gargarizans_ Cantor, Ann. Mag. Nat. Hist., ser. 1, 9:483, August, 1842 (type locality, island of Chusan, China). _Bufo bufo gargarizans_, Stejneger, Bull. U. S. Nat. Mus., 58:59, July 22, 1907. _Specimens examined_ (10).--Central National Forest, near Pup´yong-ni, 1 (KU); 5 mi. NW Choksong, near Imjin River, 1 (KU); 5 mi. E Seoul, 1 (KU); 6 mi. E Seoul, 4 (KU), 2 (UMMZ); 1 mi. S Yami-ri, 1 (KU). _Description (nine females)._--Dorsal surface brownish, having indistinct pale areas, some of which tend to form longitudinal stripes that extend posteriorly from parotoid glands; blackish mark, usually on lateral part of parotoid, having short spurs directed posteriorly and ventrally; edge of upper jaw and warts on dorsal surface becoming blackish with increasing size; small, conspicuous group of warts near angle of jaw below parotoid; middorsal warts tending, at level of posterior edge of parotoids, to form a V that has its apex between the parotoids; ventral surface pale yellowish, sometimes having well-defined blackish marks; granular underparts of large specimens having small blackish tubercles.