A NATURALISTS EXPERIENCES IN BRITISH GUIANA 
863 
ft 
Photo by C. 1. Kigenmann 
A TRAP FENCE ACROSS A CREEK EMPTYING INTO THE DEMERARA RIVER ABOVE 
WISMAR, AT LOW TIDE (SEE TEXT, PAGE 861) 
outer edge of the bar was almost barren, 
but yielded a few specimens of a minute, 
translucent Characidium that so resem- 
bles our sand-burrowing darters that we 
were amply paid for our heavy work. 
But the greatest success was obtained 
in a slough between the upper half of 
the bar and the land, where the Indians 
took half a bushel of smail fishes. There 
was a great general similarity between 
the contents of the net here and one 
drawn at any similar locality in the 
Mississippi Valley, although not a single 
Mississippi V alley species or genus was 
found in the catches. Here we secured 
the only specimen, a much mutilated one, 
of the widely distributed Symbranchus, 
and the young of many species of large 
fishes. Before starting for the sand- 
bank I had an opportunity o: securing 
a laulau, a large catfish, but in the hurry 
of getting off “and on account of a mo- 
mentary penuriousness, I took only the 
head. 
On counting noses, which has taken 
two full years since my return, I find 
that Rockstone, where our fishing began 
so discouragingly, is the richest in species 
of all the localities examined. This was 
no doubt due to the fact that conditions 
