XI. ARACHNIDA 
TO WHICH ARE ADDED 
GIGANTOSTRACA (XIPHOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRIOPODA 
and PROTOTRACHEATA 
ARRANGED DY 
W. T. CALMAN, D.Sc. 
CONTENTS. 
PAGE 
Gigantostraca. 
I. Titles = 2800 .. .. .. 4 
II. Subject-Index = 2810-2827. . .. .. .. .. 5 
III. Systematic Index=2831 : — 
Trilobita . . . . . . . . . . . . . . 0 
Xiphosuro, etc. . . . . . . . . . . . . 8 
Eurypterida . . . . . . . . . . . . . . 8 
Pantopoda. 
I. Titles =2800 10 
II. Subject Index=2807-2827 .. .. 10 
III. Systematic Index = 2831 *. .. 10 
(n-92J0 n) d 13 
