Very few aquatic plants were found at the sampling stations 

 below mile 229.8. One species of red al^ae was found at station II8.I, 

 and a blue-green alga was collected at mile I8.8. Otherwise, no identi- 

 fiable pleuit material was collected. 



In the lower-most portions of the river, emergent plants such 

 as cattail (Typha) and tule (Scirpus) are present in shallow water areas 

 along the river banks. These plants were not included in Table 1. 



Bottom Fauna 



Results of bottom saniples taken to determine the benthic favina 

 of the Sacramento River are given in Tables 2 through 16. These tables 

 present the nianbers of organisms collected per square foot at the various 

 stations during each month of the survey. The volumes of organisms are 

 not indicated; however, this information is available at the Department 

 of Fish and Game Field Station in Sacramento. 



An examination of Tables 2 through I6 indicates the large variety 

 of aquatic organisms that exists in the Sacramento River. Representatives 

 of ten phyla, remging from the sponges to the chordates were collected. 

 At least l61i- separate species of invertebrates were represented in the 

 collections in addition to one species of lanrprey. It must be pointed 

 out that a large number of individual specimens were not identified to 

 species. Some organisms were not classified below order due to lack of 

 time, facilities, and sidequate keys. 



Numbers eind Volume at Selected Stations 



The Sacramento River between Shasta Dam and the mouth was divided 

 into four major environments. These axe: (l) the upper river, which 

 consists of aJLtemate pools and riffles (approximately mile 297 to mile 

 229); (2) the upper-middle river, which contains a few riffles but mostly 



