CONTENTS. 
aeRO CG bIO Mergarrover aires ere es ecole fae tue oz co Bib Sree ie ole %s 6 susie doe a 
DictuptbonolL Collectionsiiy Months (Mable). 05... ...0.5.5-5-45-4¢ 
GO Gl Serene anne ee ae eae et gehen caters tty ee obec ars icisos ce houis wed ete 
LG are eileiabean at Seal Soa 6 Beer eke es nee oe a 
LUSS OUTS ete ee ee Re eee ee ge 
Pee emeasiiom Orbe Plankton. oo. cides dsc diet ve ee he we 
Comparison of Fresh-water and Marine Plankton................... 
CAPESST SINS) GLE EES BI ea 2 fea aera, ee Pee ee 
Constituent Groups of the Annual Plankton of the Illinois River (Table) 
Discussion of the Statistical Data of the Species composing the Plankton 
Ominealinnois aver im. 1894-1899). . | doe ces coe ee dhe ee es oe at 
rage Em ER LIE cc eM Diag BS od ec Peng SIS 4 acts ws RHR IE 
Rr eae tae ee ea A nh Ope hs as oka Gate wou A Wave ors kd bl ta 
PULSE Oe lie ia ee cs Cr ae 
rte cae a CIOS al 20. te OPS a) SI Gs een ete ices Saale A iss 56) wR a 
vo LED DARE) SENS TS a A ote ee ag et 
Pirie has MOIBOES DE CIGS foot rite) rae. ae rire 24 oe y cyaafele Sate ee SB 
(EG GL HS GESERYSE, Gee en Ee 
actors controlling Diatom Production... .. 0. .c006s02;++s08 e+: 
Diagram showing the seasonal distribution of diatoms, total 
plankton, nitrates, and ee: and cg aoe of Illi- 
nois River at Havana for 1898. re olge 
UUSTSE SISO TOIL SS OTE (Sa aoe ee er ar 
(8 Ghat ace ey ee rhe EMSA Sid ets 5. - hs aves ats fa Soden) g Anew 
LD CR STLSST 2 1O)E pS] ote GSS an ie, ee a ee 
Soh cw ery eee ie i eg hace 
PDE ELS ce soe eed, 2 coe aire ena ee 
WWII EHEICIO)ON NOTE 7 5 oloielbio tonG cl METEORS ORS. GONG ee cc Naren Re ate 
Location and Amplitude of Pulses of eae ae aad 
isms in the Illinois River (Table).. 2 ay ope 
DISCHSSIO GEOR OP CCIES MeN Sree nine oo Stsis ae lo gets a ae Patee we 
LESIME O/C CIB deat Cache Geliged nts ean ney ee 
IES EVENSE Caen CGE oe 70 yEre Ce Sy cn 
LEENOS SBI. SiGe cae ee ee ee eC ee 
[Do SEES SOTO EL? Go) PCE OR SCE Sie Ae ae 
SUD GRP E SSE Oa es & Sabo 6 Soop ae eee Oe ae a oe 
(COUN SLE oe SIG aye te Gat Sepa on cnt sn i eI ge ge 
MMSE OH Oke SPECIES. ters) |j.6 wis sbeebs Sogiels Daihen bes BiB Save He wee 
ee EN SIGS ee 2 en pide os Voki selc awed ee eRe 
DAS CUSSIO MeOlmOPECIES: 5 ce his, 5s ciel sie races are cusysueasre “ii sis ee oe egere 
TEU EIR peed ob CNN ee ee 
