III. PORIFERA or SPONGIDA 
ARRANGED BY 
H. M. WOODCOCK, D.Sc. (Lord.). 
CONTENTS 
PAGE 
I. Titles . . . . . . . . . . . . . . 2 
II. Subject Index: — 
General works, economics, and technique = 0603 
Anatomy = 0607 
Physiology = 0611. . 
Development and growth = 0615. . 
Ethology = 0619 . . 
Variation, Phylogeny = 0623 . . . . 
Distribution, Geography = 0627 . . 
III. Systematic = 0631 
Pori f era, general 
Oalcarea .. .. . . . . . . . 
Non-Calcarea 
Myxospongida (vacant). 
Hexactinellida . . 
Tetraxonida 
Homosclerophora (vacant). 
Astrotetraxonida (vacant). 
Sigmatotetraxonida 
Litkistida 
Euceratosa (vacant). 
Incertae sedis 
3 
3 
3 
3 
3 
3 
3 
4 
4 
4 
4 
5 
5 
6 
6 
b 3 
(N 13246 h) o 
