NOTES.
Reading edition
Throughout Southern Asia, including the Punjab, and both plains and peninsula of India properly so called, no species exists of the trout family or Salmonidæ. Their discovery in the streams descending from the northern declivity of the Hindoo-koosh distinguishes that chain as the southern boundary or limit of the family. It is also remarkable that the Hindoo-koosh should likewise be the exclusive province of a numerous group of small scaled Cyprinidæ, met with only in the rivers of Affghanistan, consisting of the genera, Schizothorax, Racoma, and Oreinus, of which one or two species only have been found to extend south along the plateau of the Himalaya, as far as 27° N., while the bulk of the family is confined to 34° N. See Calcutta Journ. Nat. Hist. Vol. II. p.560 t. xv.