Vegetation measurements were made during September and October 
1954; July 1955; and March and August 1956. The transects were also 
visited to record nutria activity in December 1954; February, April, 
and December 1955; and June 1956. | 
Additional data were secured from four nutria exclosures located 
as follows: 
1. Near Cheniere-au-tigre several miles south of Transect B; 
QO.1 acre in size; constructed March 1953; vegetation first 
sampled August 1953. 
2. At end of Transect C; 0.1 acre in size; constructed March 
1953; vegetation first sampled September 1953. 
3. In reed-big cordgrass type of Transect C; 0.03 acre 
(128 sq. ft.) in size; constructed May 1955; vegetation 
first sampled July 1955. 
4, In reed type of Transect C; 0.03 acre in size; constructed 
April 1955; vegetation first sampled July 1955. 
The vegetation of exclosures 1 and 2 was sampled by means of 
O.1 square meter quadrats taken systematically. Vegetation from 
the quadrats was clipped, counted, air-dried, and weighed. The 
method employed for the transects was used to measure vegetation of 
exclosures 3 and 4, 
Interpretation of the data from plant measurements was aided 
by statistical treatment. 
