III. PORIFERA or SPONGIDA 
ARRANGED BY 
H. M. WOODCOCK, D.Sc. (Lond.). 
CONTENTS 
PAGE 
I. Titles 2 
II. Subject Index: — 
General works, economics, and technique = 0603 . . 2 
' Anatomy = 0607 . . . . . . . . . . . 2 
Physiology = 0611. . .. .. .. .. .. 3 
Development aud growth = 0615. . .. .. .. 3 
Ethology = 0619 ». .. .. .. .. . . 3 
Variation, Phylogeny = 0623 . . . . . . . . 3 
Distribution, Geography = 0627 . . . . . . . . 3 
III. Systematic = 0631 
Porifera, general . . . . . . . . . . . . 3 
Calcarea . . . . . . . . . . . . . . 3 
Non-Calcarea . . . . . . . . . . . 3 
Myxospongida (vacant) 
llexactinellida # . . . . . . . . . . . 3 
Tetraxonida . . . . . . . . . . . . 3 
Homosclerophora (vacant) 
Astrotetraxonida 
Sigmatotetraxonida . . 
Lithistida (vacant) 
Euceratosa (vacant) 
Incertae sedis . . . . . , . . . . . . 4 
(n-4840 h ) 
a 5 
to co 
