2 
CHAETOGNATHA, GASTROTRICHA, ROTIFERA. 
PAGE 
Subject-Index : — 
Comprehensive and General = 1 603 , . . . . . . . 20 
Structure =1607 .. .. .. .. .. ..20 
Physiology =1611 .. ... .. .. . . .. 20 
Development=16l5 .. .. .. .. .. ..20 
Ethology=1619 .. .. .. .. .. ..20 
Variation, Phylogeny= 1623 . . . . . . . . . . 20 
Distribution (Geography) = 1627 .. .. .. .. 21 
Systematic =1631 : — 
Chaetognatha . . . . . . . . . . . . ... 21 
Gastrotricha . . . . . . . . . . . . . . 21 
Rotifera . . . . . . . . . . . . 21 
ANNELIDA, GEPHYREA, PH0R0NIDEA, 
PTEROBRANCHIATA. 
Subject-Index : — 
Comprehensive and General =1803 .. .. .. ..21 
Structure =1807 .. .. .. .. .. ..21 
Physiology =1811 .. .. .. .. .. ..21 
Development=1815 .. .. .. .. .. ..22 
Ethology=1819 .. .. .. .. . . ..22 
Variation, Phylogeny= 1823 . . .. .. .. .. 22 
Distribution (Geography) = 1827 .. .. .. ..22 
Systematic = 1831 :-r- 
Annelida . . . . . . . . . . . . 22 
Archiannelida (vacant). 
Polychaeta . . . . . . . . . . . . 22 
Myzostomida (vacant). 
Oligochaeta . . . . . . . . . . . . 25 
Hirudinea . . . . . . . . . . . . . 25 
Echiuroidea (vacant). 
Gephyrea (vacant). 
Phoronidea (vacant). 
Pterobranohiata (vacant). 
