XI. ARACHNIDA 
TO WHICH ARE ADDED 
GIGANTOSTRACA (XIPHOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRIOPODA 
and PROTOTR AGUE AT A 
ARRANGED BY 
W. T. CALMAN, D.Sc. 
CONTENTS. 
I’ AGE 
Gigantostraca. 
I. Titles = 2800 .. .. .. .. .. .. .. 4 
II. Subject-Index = 2803-2827. . .. .. •• 5 
III. Systematic Index = 2831: — 
Trilobita . . . . . . . . . . . . . . 6 
Xiphosurn, etc. . . . . . . . . . . . . 9 
Eurypterida . . . . . . . . . . . . . . 9 
Pantopoda. 
I. Titles = 2800 .. .. .. .. .. .. ..10 
II. Subject Index=2803-2827. . .. .. .. .. 10 
HI. Systematic Index= 2831 .. .. .. .. H 
(n • 9242 n) c 15 
