XI. ARACHNIDA 
TO WHICH ARE ADDED 
ANTOSTRAOA (XIPIIOSURA, TRILOBITA, EURYPTERIDA), 
PANTOPODA, TARDIGRADA, PENTASTOMIDA, MYRIOPODA 
and PROTOTR AO HE AT A 
ARRANGED BY 
W. T. OALMAN, D.Sc. 
CONTENTS. 
PAGE 
Gigantostraca. 
I. Titles = 2800 .. .. .. .. .. .. .. 4 
II. Subject-Index=2810-2827. . .. .. .. 5 
III. Systematic Index=2831: — 
Trilobita ..... . . . . . . . . . . 6 
Xiphosura . . . . . . . . . . . . . . 8 
Eurypterida . . . . . . . . . . . . . . 8 
Pantopoda. 
I. Titles = 2800 . . . . . . . . ... . . . . 9 
II. Subject Index= 2807-2827. . .. .. .. .. 9 
III. Systematic Index= 2831 .. .. .. .. .. 10 
(n-9186 n ) d 5 
