Of Dall's sheep, Mr. Stone declares that it is rapidly growing scarcer, and this statement is based not only on his own observation, but on reports made to him by the Indians. Mr. Stone describes it as possessing wonderful agility, endurance, and vitality, and gives many examples of their ability to get about among most difficult rocks when wounded. He adds: "From my experience with these animals, I believe they seek quite as rugged a country in which to make their homes as does the Rocky Mountain goat. They brave higher latitudes and live in regions in every way more barren and forbidding." He reports the females with their lambs as generally keeping to the high table lands far back in the mountains. Among the specimens which he recently collected, broken jaw bones reunited were so frequent among the females killed as to excite comment. Notwithstanding Mr. Stone's gloomy view of the future of this species, we may hope that the enforcement of the game laws in Alaska will long preserve this beautiful animal. Our knowledge of the habits of the Lower California sheep inhabiting the San Pedro Martir Mountains has been slight. Mr. Gould's admirable account of a hunting trip for them--"To the Gulf of Cortez," published in a preceding volume of the Club's book--will be remembered, and the curious fact stated by his Indian guide that the sheep break holes in the hard, prickly rinds of the venaga cactus with their horns, and then eat out the inside. Recently, however, a series of thirteen specimens collected by Edmund Heller were received by Dr. D.G. Elliot, and described, as already stated, and he gives from Mr. Heller's note-book the following notes on their habits: "Common about the cliffs, coming down occasionally to the water holes in the valley. Most of the sheep observed were either solitary or in small bands of three to a dozen. Only one adult ram was seen, all the others, about thirty, being either ewes or lambs. The largest bunch seen consisted of eleven, mostly ewes and a few young rams." The sheep, as a rule, inhabit the middle line of cliffs where they are safe from attack above and can watch the valley below for danger. Here about the middle line of cliffs they were observed, and the greater number of tracks and dust wallows, where they spend much of their time, were seen. A few were seen on the level stretches of the mesas, and a considerable number of tracks, but these were made by those traveling from one line of cliffs to another.