FISHES OF STREAMS TRIBUTARY TO MONTEREY BAY 
55 
If the migration of these fishes from their native basin was accomplished during the 
glacial epoch or near its close, we have here a possible indication of the vast amount of 
time necessary for the appearance in nature of a slight amount of differentiation, for the 
Pajaro forms which have been described as distinct species differ only in a small degree 
from the parent forms of the Sacramento. 
Table Showing Distribution or Species in the Pajaro System. 
1 Entosphenus tridentatus. | 
j Catostomus mniotiltus. | 
j Orthodon microlepidotus. j 
1 Lavinia ardesiaca. j 
1 Ptychocheilus grandis. 
j Hesperoleucus subditus. 
j Agosia carringtoni. 
j Salmo irideus. j 
1 Oncorhynchustschawytscha. 
1 Oucorhynchus kisutch. 
1 Gasterosteus cataphractus. 
1 Archoplites interruptus. 
1 Hysterocarpus traski. | 
Cottus asper. j 
1 Cottus aleuticus. j 
i 
o 
! 
3 
o 
Saa Lorenzo Basin: 
X 
X 
X 
X 
X 
X 
X 
X 
y 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Pajaro Basin: 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Salinas Basin: 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Salinas near Salinas 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Salinas near Blanco 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
San Antonio Creek near Mission 
X 
X 
X 
X 
X 
San Antonio in mountains 
X 
X 
Arroyo Seco i mile above mouth 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Arroyo Seco 6 miles above mouth 
X 
X 
X 
X 
X 
X 
