This range of the peninsula is in itself quite peculiar from the others which we have hitherto noticed thus far. It differs from their physiognomy in one respect—the mountains and ridges themselves are interrupted in one continuity down the line of their extension by abrupt depressions. These passes, as they appear to be, are not so in fact, but are either low or elevated marshy plains, which extend clear across the peninsula; they create an impression in the mind of the observer that at a not very remote period, geologically speaking, the peaks of this peninsula range were then islands, and the marshy portages, now elevated, were the bottoms of the straits then between them. The natives are continually going to and fro between the waters of Bering Sea and the Pacific Ocean over these areas of swampy level, engaged in hunting reindeer, bear, or in friendly intercourse with the settlements. The most signal mountain groups on the peninsula are those of Morshovie, of Belcovsky, and the Pavlosk volcanic cluster—all joined by low, wet isthmian swales. The Shoomagin volcano of Veniaminov is also a noteworthy peak. The peninsula is almost bisected between Moller and Zakharov Bays, where the natives cross from water to water in a half-day’s portage, and again at Pavlov Harbor. All these isolated or nearly detached mountain sections have a striking resemblance in every respect to the first large island, Oonimak, that is separated from the mainland by the narrow and unnavigable Krenitzin Straits. The Bering Sea coast line of the great Alaskan Peninsula presents a most radical contrast to that of the Pacific—the unbroken, rocky abruptness and roughness there is here suddenly transformed right at the very turn in the Straits of Krenitzin, to low, sandy reaches and slightly elevated moorland tundra, which cover a wide interval between the mountains and the waters of Bristol Bay and Bering Sea. The huge masses of lava, of breccia and conglomerate tufa, that everywhere rear their black-ebony shoulders above the Pacific surf, disappear entirely and suddenly here. At Oogashik, where we find a small settlement of Aleutes from Oonalashka, hunting walrus and sea-lions, reindeer and bears, the first rocks of granite and quartz-porphyries appear, every evidence of that character to the westward being purely and essentially igneous. [Illustration: The Walrus-hunting Village of Oogashik.]