248 
data of the appended table, which gives the statistics of temperature, 
river level, and Diaphanosoma population during the periods of 
maximum development in 1895-1898. All these data except those 
of Diaphanosoma are shown graphically in Part I., Plates [X.—XII. 
The data for Diaphanosoma are less complete than the others, since 
all of the collections were not counted. 
In 1895 the Diaphanosoma pulse culminates at 19,602 on August 
21, following immediately upon a heat pulse which culminates 
August 15 at 85.3°. The decline of the pulse occurs with a decline 
of temperature to 72° on September 7. The declines, both of 
Diaphanosoma and temperature, are hastened after September 3 by 
1895 | 1896 
| River | No. of River No. of 
Date | Temp. | Dzaph- Date Temp. | Diaph- 
| eS anosOmMma | See" | anosOoma 
ee re =| algne wieeeoeets 80.8 40 
——— | =— | — | ——|| * 10] 4.00 | 7835 800 
gee if ee) pe EE HS a tie aoa | 79 400 
aly 23) | Se 20s |) 80 | 424 l 28420 80 120 
E204, $38 | 75.5 240 He 28-al) G40) 0) 282 7,440 
ag. 1 |) 42208 |) 7845 1,088 || Aug. 3) 8.50 | 80.3 160 
1 18))| 122)368 79 9880) oie8 ly Be40 | 86 | 14,260 
C2: IDeA Ol esate 9,801 | « 45 | 7.40 | 82 2,240 
EES Pa aD eOe BIS 19,662 FE Oi eT SLO | 79 880 
292258 || 780s peat 250 eS 264) G50 Hg a 600 
Seat ier th, aor 440 
Seni ed 5.70 | 74 189 | Sept. 16 | 4.10 73.5 663 
CSTD 31100 | Ce NC Sl OSE: i 30m" 230 58 80 
UF OO e 3. 20 79 | 468 | ——— SS ee 
«97 -[> 3.93 | 73M aise |S ee 
