LIFE IN THE EARLY CAMBRIAN 2/ 



Hyme7iocaris vermicauda of Salter (Fig. 3) may 

 serve to illustrate one of these primitive forms. 



In point of fact, as Dr. Henry Woodward has 

 shown in an able presidential address delivered to 

 the Geological Society in 1895, ^.t the base of the 

 Lower Cambrian we still have several distinct groups 

 of Crustacea ; and if with some we were to hold them 



Fig. 3. — Hynienocaris vermicauda, Salter. 

 A Lower Cambrian Shrimp of generalized type. (After Salter.) 



as traceable to one original form or to a worm-like 

 ancestor, we must seek for this far back in those 

 pre-Cambrian rocks in which we find no Crustaceans 

 whatever. There is, it is true, no good reason to 

 demand this ; for whatever the cause, secondary or 

 final, which produced any form of Crustacean in the 

 Lower Cambrian, it might just as well have pro- 

 duced several distinct forms. Evolutionists seem 



