JKLLYKISH 
SHRIMPLIKE FORM 
( hymenocaris) 
SPONGES 
LAMPSHELL 
STARFISH 
WORM 
LAMPSHELL 
CRINOIDS 
ixoKi) SNAIL 
WATERFLKAS 
SPONGE 
SNAIL 
with cap-like shell 
(Platyceras) 
Modioloule 
Modioloides 
Oldhamia 
Trilobites 
CAMBRIAN PERIOD 
To .face p. 11 
