Arad in. 1 
XI. ARACHNIDA 
(Including TARDIGRADA and PENTASTOMIDA). 
BY 
W. T. Calm an, D.Sc. 
CONTENTS. 
Page 
1 ntroduction. 
1 
I. Titles. 
2 
II. Subject Index, 
1. Morphology . . . 
16 
2. Physiology. 
16 
3. Reproduction and De- 
velopment . . . . 
16 
4. General Bionomics, Ha- 
(See. • • • • 
17 
5. Symbiosis and Parasi- 
tism. 
17 
6. Miscellaneous .... 
18 
III. Distribution. 
a. Geographical.... 
18 
b. Geological .... 
22 
IV. Systematic Index. 
Page 
Arachnida, General. . . 
. 22 
1. Scorpiones . . . 
. 22 
2. Pedipalpi .... 
. 24 
3. Palpigradi. . . . 
. 25 
4. Aranese .... 
. 25 
a. Mygalomorplue . 
. 25 
b. Arachnomorphse 
. 27 
5. Solifugee .... 
. 52 
6. Pseudoscorpiones . 
. 52 
7. Opiliones .... 
. 53 
8. Acari. 
. 55 
9. Tardigrada [Vacant] . 
10. Pentastomida [Vacant] 
INTRODUCTION. 
The Record of Arachnida for 1902 like that of Crustacea stands in need of 
apology. It has been compiled somewhat hastily and under circumstances 
which render it probable that many omissions will be discovered. The 
Recorder will be glad to have his attention drawn to any such omissions 
and hopes to be able to include most of them in next year’s Record. 
One or two changes have been made in the arrangement of the material. 
Of these the most important is a reversion to the plan of dividing up 
the unwieldy mass of references under Aranece into groups of families. 
Mr R. I. Pocock, at whose suggestion the change is made, has very kindly 
helped the Recorder to arrange the references under these headings. It is 
hoped that this arrangement will be found more convenient by those using 
the Record. 
