XIII. PROCHORDATA 
incl. ENTEROPNEUSTA 
ARRANGED BY 
I. B. J. SOLE AS 
CONTENTS 
TAGE 
j. Titles 2 
II. Subject-Index ’ . . 4 
General . . . . . . . . . . . . . . 4 
Structure . . . . . . . . . . . . . . 4 
Physiology . . . . . . . . . . . . 4 
Development . . . . . . . . . . . . 4 
Ethology . . . . i . . . . . . . . . 5 
Distribution, geographical and geological . . . . 5 
III. Systematic Index.. , .. .. .. .. 5 
Tunicate' .. .. .. .. .. .. ... 5 
Oephalochordata . . . . . . . . , . . . 7 
Enteropneusta . . . . . . . . . . . . 7 
(n-10189 c) 
c 32 
