III. PORIFERA OR SPONGIDA 
ARUANaEU BT 
H. M. WOODCOCK, D.Sc. (Lond.). 
CONTENTS 
PAGE 
I. Titles . . , . . , . . . . . . , . 2 
II. Subject Index: — ^ 
General works, economics, and technique = 0603 , . 3 
Anatomy = 0607 . . . . . . . . , . . . 3 
Physiology = 0611. . .. .. .. .. .. 3 
Development and growth = 0615. . . . . . . . 3 
Ethology = 0619 . , . . . . . . . . . . 3 
Variation, Phylogeny = 0623 . . . , . . . » 3 
Distribution, Geography = 0627 .. .. .. .. 3 
III. Systematic = 0631 
Porifera, general . . . . . . . . . . . . 3 
Calcarea . . . . . . , . . . . . . . 3 
Non-Calcarea . . , . . . . . . 4 
Myxospongida (vacant). 
Hexactinellida , , . . . . . . . . 4 
Tetraxonida . . . . . . . . . . . . 4 
Homosclerophora (vacant). 
Astrotetraxonida (vacant). 
Sigmatotetraxonida . . . . . , . . 4 
Lithistida (vacant). 
Euceratosa (vacant). 
b 3 
(h-18799 A) Q 
