2 
CHAETOGNATHA, GASTROTRICHA, ROTIFERA 
I'AGE 
Subject Index ; — 
Comprehensive and General = 1603 . . .. .. ..44 
Structure=1607 , . .. .. .. .. 45 
Physiology=1611 .. .. .. .. .. ..45 
Development= 1615 .. .. .. .. .. ..45 
Ethology = 1619 .. .. .. .. .. ..45 
Variation, Phylogeny= 1 623 . . . . . . . . 45 
Distribution (Geography) =1627 .. .. .. .. 46 
Systematic =1631 : — 
Chaetognatha . . . . . . . . . . . . ..46 
Gastrotricha .. .. .. .. .. .. .. 46 
Rotifera . . . . . . . . . . . . 46 
ANNELIDA, SIPUNCULOIDEA, PHORONIDEA, 
PTEROBRANCHIATA 
Subject Index : — 
Comprehensive and General =1803 .. .. . , .. 47 
Structures 1807 .. .. .. .. .. ..47 
Physiology=1811 .. .. .. .. .. ..48 
Development=1815 .. .. .. .. .. ..48 
Ethology=1819 .. .. .. .. .. ,.49 
Variation, Phylogeny= 1823 . . .. .. .. ..49 
Distribution (Geography) = 1827 .. .. .. ..49 
Systematic = 1831 : — 
Annelida . . . . . . . . . . . . 51 
Archiannelida .. .. .. .. .. .. 51 
Polychaeta .. .. .. .. .. .. ..51 
Myzostomida . . . . . ^ . . . . . . 54 
Oligochaeta . . . . . . . . . . . . 54 
Ilirudinea . . . . . . . . . . . . . . 55 
Echiuroidea . . . . . . . . . . . . . . 56 
;Sipunculoidea . . . . . . . . . . . . . . 56 
Phoronidea .. .. .. .. 56 
Pterobranchiata . . . . . . . . . . . . 56 
