66 THE OPEN BOOK OF NATURE 
and crabs. The Péierygotus (Greek, plteryx =a wing, 
ous (otos)=an ear), which is found in fossil form 
in Silurian and Devonian rocks, was a big Crus- 
tacean. A specimen was discovered by the 
celebrated geologist, Hugh Miller, at Carmyle in 
Forfarshire. It measured nearly six feet long and 
over a foot across. By the way, if my young 
readers want some geological inspiration, they 
see 
SS ; 
Fig. 16.— ARCHZONISCUS Fic. 17.—HYMENOCARIS VER- 
EDWARDSI. MICAUDA. 
A fossil Wood-louse A fossil Cambrian shrimp-like 
(Jurassic). animal. 
should read the “Life”? of Hugh Miller, and 
some of his writings, particularly “The Old Red 
Sandstone.” 
2. Myriapoda (Greek, myrios = numberless, pous = 
a foot).—Animals with many segments, distinct 
heads, wormlike bodies, and many legs. They 
breathe by means of organs known as tracheal tubes. 
They have a pair of feelers called “ antenne.” 
Examples: Millipedes and Centipedes. fossil 
remains of millipedes, which must have lived on 
decayed wood, have been found in the Scottish 
Lower Old Red Sandstone (Devonian Period), and 
also in rocks of Carboniferous Age. Both centipedes 
and. millipedes are vegetarians, and quite harmless : 
they are land animals. 
