26 THE AMERICAN MIDLAND NATURALIST 
LOCALITIES REPORTED UPON. (ref. maps.) 
VIII—1. Starting at Govt. Light 902.35 ft. off shore, 
south of island 4. August 11, 1920. 
VIII—10. One-half mile around the bend from Govt. 
Light 896,35 ft. off shore, starting point adjacent to coulee 
south of Chimney Rock. August 14, 1920. 
VII—19. Straight Slough, 100 ft. south of the north of 
the first large slough leading from it, (at upper end) to the 
C. M. « St. P. R. R. tracks from 655 elevation; on opposite 
shore at distance 20 ft. from banks. August 16, 1920. 
NOTES ON ‘AREA. 
This area stands third in the abundance of juveniles found. 
Remnants of a bed were found along the water front at Min- 
neiska. This is given in locality VIII-1. Locality VIII-10 
represents the old Chimney Rock Bed. Juveniles secured in 
this and succeeding areas were obtained from sand _ bars 
principally by hand. 
In this area, there were frequently collected upon the sand 
bars crayfish which Dr. A. E. Ortmann of the Carnegie 
Museum, Pittsburgh, Pa., pronounced to be Cambarus (Haxo- 
hus) virilis Hagen, (males of the second form,) and Cambarus 
blandingui acutus Gerard, (males of the second forms). 
As early as the latter part of July there was noticed a 
brilliant bluish-green scum upon the shore of the sloughs and 
sand bars. Some of the material was sent to Dr. G. T. 
Moore, director of the Missouri Botanical Garden for iden- 
tification. Dr. Moore stated it ‘“‘was a mixture of 3. blue- 
green algae, the major portion being Clathrocystis serrigensa, 
with occasional colonies of Coelosphaerium kuetzingianum, 
as well as occasional colonies of Anabaena flos-aquae. This 
mixture is a very common one and has been associated for a 
number of years with the phenomemon known abroad as the 
“breaking of the meres.” In this country it is generally re- 
ferred to as the “flowering of the waters.” 
Dr. C. B. Davenport, of the Carnegie Station for Experi- 
mental Evolution, Cold Spring Harbor, N. Y., identified 
specimens of Bryozoa forwarded him as Pectinatella magni- 
fica. These were collected from Fountain City Bay, Fountain 
