3 
Acan • • « « • • 
Oribatidae, etc. . . 
Gamasidae. . 
Ixodidae and Argasidae 
Trombidiidae, etc. 
Hydrachnidae • • 
Halacaridae 
Bdellidae (vacant). 
Sarcoptidae 
Tyroglyphidae 
Demodicidae (vacant). 
Eriophyidae 
Tardigrada 
Pentastomida 
Myriopoda. 
I. Titles=3400 . • 
II. Subject-Index= 3403-3 127 : — 
General 
Structure 
Physiology 
Development 
Ethology 
Variation and Aetiology 
Distribution (Geographical) 
Distribution (Geological) . . , 
III. Systematic Index=3431 : — . 
Chilopoda . .. . * 
Symphyla 
Pauropoda (vacant). 
Diplopoda 
Prototracheata 
* 
PAGE 
.. 24 
.. 24 
. . 24 
25 
25 
. . 26 
.. 27 
.. 27 
.. 27 
.. 27 
27 
* . 27 
.. 28 
.. 29 
30 
.. 30 
.. 30 
.. 30 
30 
. . 30 
30 
.* 31 
.. 32 
.. 32 
.. 38 
(n-13246 n ) q 
b 19—2 
