PAGE 



Coelenterata 132 



Platyhelminthes 133 



Turbellaria 133 



Trematoda 134 



Cestoda 135 



Nemertini 135 



Nematelminthes 135 



Nematoda 135 



Acanthocephala 136 



Annulata 136 



Oligochaeta 136 



Naididag 137 



^Eolosomatidag 137 



Rotifera 138 



Rhizota 139 



Discussion of Species 140 



Bdelloida 141 



Discussion of Species 141 



Ploima 144 



Pulses of Ploima (Table) 146 



Discussion of Species 147 



Tabular statistical data : 



Pulses of Anurcea cochlearis ISO, 153 



Pulses of A nurasa hypelasma 155 



Pulses of Asplanchna brightwellii 156 



Evidence of polycyclic character of seasonal distribution of above . 158 



Evidence of same for Asplanchna priodonta 161 



Pulses of Brachionus angularis 165 



Collection data for Brachionus bakeri and varieties 169, 170 



Pulses of Brachionus budapestinensis 176 



Pulses of Brachionus militaris 179 



Pulses of Brachionus mollis 181 



Brachionus pala and varieties. Average number per collection . 182 



Pulses of Brachionus pala and varieties 184 



Brachionus pala, type form. Sexual cycle 188 



Seasonal distribution of B. pala and its var. amphiceros 189 



Seasonal limits of B. pala var. dorcas 191 



Pulses of Brachionus urceolaris 193 



Brachionus urceolaris and varieties and B. variabilis. Average 



number per collection 196 



Pulses of Polyarthra platyptera 204 



Pulses of Synchceta pectinata 211 



Pulses of Synch&ta stylata 213 



Pulses of Triarthra longiseta 218 



Scirtopoda 219 



Seasonal fluctuations of Pedalion mirum (Table) 220 



Gastrotricha . . 221 



