GEOLOGICAL SURVEY OF CANADA. 



PALEOZOIC FOSSILS. 



VOL. III. 



7. Illustrations of seven species of fossils from the Cambrian, Carahro- 

 Sihman, and Devonian rocks of Canada. 



By J. F. Whiteaves. 



These species have been described, at various times, in the " Canadian 

 Record of Science " or " Ottawa Naturalist." But, four of them have 

 not previously been figured at all, and not one of them has been either 

 described or figured in any of the publications of the Survey. 



A. FROM THE CAMBRIAN ROCKS OF BRITISH COLUMBIA. 



Anomalocaris Canadensis, Whiteaves. 



Anornalocaris Canadensis, Whiteaves 1892. Canad. Rec. Sci., vol. Y, pp. 205 and 



206, with the text figure here reproduced. 



The following is a copy of the original description of this genus and 

 species : 



Anomalocaeis. (Gen. nov.) 



" Carapace and its appendages unknown or too obscurely indicated for 

 their characters to be defined ; body many jointed and consisting of not 

 less than nine to thirteen segments, exclusive of the caudal segment ; 

 ventral portion of each of the body segments bearing a pair of slender, 

 narrowly elongated i-ad acutely pointed, simple and probably branchial 

 appendages, of the nature of uropods or foot gills : posterior terminal 

 segment margined with three pairs of caudal spines, one terminal and the 

 other two lateral, — the posterior pair of uropods represented in the wood- 

 cut apparently belonging to a pre-caudal segment whose posterior 

 boundary has been obliterated." 



