XI. ARACHNIDA 
TO WHICH ARE ADDED 
GIGANTOSTRAOA (XIPHOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRIOPODA 
and PROTOTRACHEATA 
ARRANGED BY 
W. T. CALMAN, D.Sc. 
CONTENTS. 
PAGB 
Gigantostraca. 
I. Titles = 2800 .. .. .. .. 4 
II. Subject-Index = 2803-2827. . .. . . .. .. 5 
III. Systematic Index= 2831 : — 
Trilobita . . . . . . . . . . . . . . 5 
Xiphosura, etc. . . . . . . . . . . . . 6 
Eurypterida . . . . . . . . . . . . . . 6 
Pantopoda. 
1. Titles =2800 7 
II. Subject-Index= 2803-2827 .. .. 7 
III. Systematic Index= 2831 .. .. .. .. 7 
(n- 8913 n) a 20 
