. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 108 CALIFORNIA FISH AND GAME All trout of this species found elsewhere in the Lahontan Basin are similarly spotted. An enumeration of the spots of several speci- mens follows: Locality Lake 'I'd hoc Tj iickee Rive • Pyrami Lake d Spots on side of head Body above lateral line 55 95 60 103 53 45 44 42 93 16 100 45 48 25 86 234 12 44 49 39 31 103 284 44 115 175 63 57 55 145 68 92 159 59 82 45 162 6. 102 121 52 56 66 184 20 51 16 42 28 52
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 108 CALIFORNIA FISH AND GAME All trout of this species found elsewhere in the Lahontan Basin are similarly spotted. An enumeration of the spots of several speci- mens follows: Locality Lake 'I'd hoc Tj iickee Rive • Pyrami Lake d Spots on side of head Body above lateral line 55 95 60 103 53 45 44 42 93 16 100 45 48 25 86 234 12 44 49 39 31 103 284 44 115 175 63 57 55 145 68 92 159 59 82 45 162 6. 102 121 52 56 66 184 20 51 16 42 28 52 65 13 43 Body below lateral line 113 0 Tail above lateral line Tail below lateral line 43 59 40 7 On dorsal fin Caudal fin 36 66 41 95. Fig. 21. Llewellyn , the barrier which prevents the passage of trout of the species Salmo hensliaivi into the basin Photo occupied by E. L. by Salmo Macaulay. It is a well-known isolated animals tend to seleniris. biological These fish measured from 14^ to 28 J inches in length. The tspots of «S'. henshau'i are so numerous, large and conspicuous that the .species is commonly referred to by liatcheiy men as the black-spotted trout. Recognizing that the trout above Llewellyn Palls may be regarded as members of a species which is different from that below, one asks concerning their origin and the means by which they arrived. The immediate and only answer is that they have been there as long as any trout have been in the Carson Basin. The falls are of more recent origin than the trout. Before the falls became a barrier to free migration, the trout of the streams of Fish Valley were not different from others in the river below. When the falls became an obstruction to the passage of fish those above became insular. Some of their number might occasionally drift down over the falls to be ultimately lost in a large poyiulation, but none from below could ever mingle Avith those above. principle or law that insular or change from the parent sto
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