III. PORIFERA or SPONGIDA 
ARRANGED BY 
H; M. WOODCOCK, D.Sc. (Lond.). 
CONTENTS 
PAGE 
I. Titles . . . . . . . . . . . . . . 2 
II. Subject Index :— 7 
General works, economics, and technique = 0603 . . 3 
Anatomy = 0607 .... . . . . , . . - 3 
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 . . . . . . . . . . . . 4 
Myxospongida (vacaut) 
Hexactinellida (vacant) 
Tetraxouida . . . . . . . . . . . . 4 
Homosclerophora (vacant) 
Astrotetraxonida .. .. .. .. .. 4 
Sigmatotetraxonida . . . . . . . . . . 4 
. Lithistida (vacant) 
Euceratosa . , . . . . . . . . . . 4 
Incertae sedis .. .. .. .. .. 4 
(n-5464 h) a I 
