. An account of the birds and mammals of the San Jacinto area of southern California with remarks upon the behavior of geographic races on the margins of their habitats . PLATE 7 Profile along divide separating deserl and Pacific drainages, in south-ern California, from the high southern Sierras to the Mexican line,showing life zones. This profile is of course not in a straight line betweenthe terminal points. Care has been taken to represent the life zones intheir proper relative extents with due regard to total distance, as wellas to altitude. The diametrical dimension thus shown may be take
. An account of the birds and mammals of the San Jacinto area of southern California with remarks upon the behavior of geographic races on the margins of their habitats . PLATE 7 Profile along divide separating deserl and Pacific drainages, in south-ern California, from the high southern Sierras to the Mexican line,showing life zones. This profile is of course not in a straight line betweenthe terminal points. Care has been taken to represent the life zones intheir proper relative extents with due regard to total distance, as wellas to altitude. The diametrical dimension thus shown may be taken as an index in each ease to the area involved. This statement has 1 q verified by comparison with an ordinary /one map of the region. [400]. PLATE 8 Fig. 1. San Jacinto Peak, in back center, as viewed from TahquitzPeak. The steep declivity in foreground rises from Strawberry Val-ley; at extreme right center is the edge of Tahquitz Valley. The patchesof brush in the right foreground are chiefly composed of chinquapin(Castanopsis sempervirens) and manzanita (Arctostaphylos patula). Herei- the summer borne of Passerella iliaca stephensi and the forage groundof I-, aid ruins speciosus, Imtli being animals of the upper Transition trees on the ridge at the right are chiefly Jeffrey pines, those onthe higher distant slopes are lodgepole and limber pines. The latter twoare purely Boreal elements. Pig. 2. Southeast wall of Strawberry Valley, showing lower Transitiun foresl of black oak, incense cedar, yellow j>inc and sugar pine,with silver firs of upper Transition on the higher pint inns of the this wooded slope were heard the notes of Strix o. occidentalis;other characteristic liinls were: Piranga ludovicia
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectmam
