XI. ARACHNIDA 
TO WHICH ARE ADDED 
GIGANTOSTRAOA (XIPHOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRFOPODA 
and PROTOTR AOJLIE AT A 
ARRANGED BY 
W. T. GALMAN, D.Sc. 
CONTENTS 
PAGE 
Gigantostraca. 
I. Titles = 2800 .. .. .. .. .. .. ..4 
II. Subject-Index=2810-2827. . .. .. .. ..5 
III. Systematic = 2831 : — 
Trilobita . . . . . . . . . . . . 6 
Xiphosura . . . . . . . . . . .... 9 
Eurypterida . . . . . . . . . . . . . . 9 
Pantopoda. 
I. Titles = 2800 .. .. .. .. .. .. .. 10 
IF. Subject Index = 2807-2827. . .. .. .. .. 10 
III. Systematic = 2831 .. 10 
(n-11091 n ) d 6 
