of maxillary bones with ethmoid structure. Nasal bones 6/5 FAMILY OF P

Chapter

posteriorly broadened. Supraorbital processes present. Upper anterior incisors without notch on cutting surface. Molars ................................................................................ Family Leporidae. Sizes small, smallest in the order. The body length varies from 120 to 280 mm; weight from 170 to 240 g. Externally pikas are similar to small rabbits, but with shorter limbs and small ears. The limbs are relatively short; the hind legs just slightly (not more than 20-25%) surpass the length of fore legs. The fore limbs have 5

ABSTRACT

The hand is articulated mainly with the ulna, which is twice as thick as the radius. As in hares, the pubic symphysis is absent in the pelvis.

The diploid complement of chromosomes varies from 38 in Ochotona paHasi£o68 in O. pusilla, O. collaris and O. princeps.

of maxillary bones with ethmoid structure. Nasal bones 6/5 FAMILY OF PIKAS FAMILIA OCHOTONIDAE THOMAS, 1897 = 26. The third* upper

ABSTRACT