If the Phylactolaemata were evolved from the type of structure represented by Phoronis or the Pterobranchia, the Gymnolaen ata should be a further modification of this type, and the comparative study of the embryology of the.two orders would appear to be meaningless.
The Murtagh-ata (25,780 ft.), shoot up far above the limits of perpetual snow.
In the Western Arid Transition zone the flora consists largely of the true sage brush (A rtemisia trident ata), but some tracts are covereci with forests of yellow or bull pine (Pinus ponderosa).
AULIE-ATA, a town and fort of Russian Turkestan, province of Syr-darya, 152 m.
The axis, or backbone, of Pamir formation is the great meridional mountain chain of Sarikol - the ancient Taurus of tradition and history - on which stands the highest peak north of the Himalaya, the Murtagh Ata (25,000 ft.).
In the Muztagh-ata or Tagarma, of 23,000 ft.
In1906-1908Dr Stein made a second and more important journey, principally for the purpose of antiquarian research, though he also carried out important geographical investigations, with the assistance of a native surveyor, in the Eastern Pamirs (about Mustagh-ata), in the Nissa valley south of Khotan, and elsewhere.
The Alexander Mountains terminate over against the town of Aulie-ata (70 20' E.) at the relatively low altitude of 2460 ft., though farther east they rise to 13,000-14,000 ft., and even reach 15,350 ft.