XI. ARACHNIDA 
TO WHICH ARE ADDED 
GIGANTOSTRACA (XIPHOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRIOPODA 
and PROTOTRACHEATA 
ARRANGED BY 
R. SHELFORD 
CONTENTS 
PAGE 
Gigantostraca. 
I I. Titles = 2800 .. • • 4 
^11. Subject-Index=2803-2827 : — 
Structure . . . . . . . . . . . . . . 6 
Development. . . . . . . . . . . . . . 6 
Distribution (Geological and Geographical) .. . . 6 
III. Systematic = 2831 : — 
Trilobita . . . . . . . . . * . . . . 6 
Xiphosura . . . . . . . . . . . . . . 9 
Eurypterida . . . . . . . . . . . . . . 10 
Pantopoda. 
I. Titles=2800 .. .. .. . . .. .. .. 11 
IT. Subject Index = 2803-2827. . .. .. . . .. 11 
III. Systematic = 2831 .. . . .. •• .. ..12 
(n-10189 n ) cl 
