. Biology in America. Biology. 172 Biology in America winjred butterfly may be found flitting over the barren lands of the Arctic and the highest mountain peaks. Many other types of insects may also be found here. Over the ice and snow fields of the Arctic the polar bear holds sway, the mortal enemy of the seal, while the arctic fox plays the part of a hanger-on at court, feasting upon the remains of seal which <lrop from the royal table. Over the tundras of the barren lands, covered with an abun- dant vegetation in the brief summer, roam the musk ox and the barren ground carilxni, while th
. Biology in America. Biology. 172 Biology in America winjred butterfly may be found flitting over the barren lands of the Arctic and the highest mountain peaks. Many other types of insects may also be found here. Over the ice and snow fields of the Arctic the polar bear holds sway, the mortal enemy of the seal, while the arctic fox plays the part of a hanger-on at court, feasting upon the remains of seal which <lrop from the royal table. Over the tundras of the barren lands, covered with an abun- dant vegetation in the brief summer, roam the musk ox and the barren ground carilxni, while the arctic hare, the mar- mot and the lemming or northern mouse, find a table plen- tifully spread with roots and The Woodchuck Photo by Eltcin R. Sanhorn. Courtcmj of the Neic York Zoological Society. Descending from the barren summit of the mountain to timber line one encounters the outposts of the forest at an altitude of 11,500 feet in the form of stunted spruce and pine, "whose gnarled and weather-beaten forms bear testimony to the severity of their struggle with the ; Below timber line one comes to a rather indefinite zone characterized by spruces and fox-tail pines. IMany of the plants characteristic of this zone on San Fi'ancisco Mountain are represented by the same or closely related species in the "upper spruce belt of the higher Alleghenies, the Rocky Mountains, the Cascades, and the Sierra Nevada, and ... the great northern spruce forest of ; Here live several. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger
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