NO. 3 BURGESS SHALE FOSSILS WALCOTT 39 



Plate 4 



PAGE 



Canadia spinosa Walcott 4 



Fig. I. (X I-5-) Specimen having an unusually straight position, with 

 all the spines turned backward and thus crowded together. 

 2,3. Natural size and enlarged (X3^ views of a fine complete 

 individual. The enlarged picture has been retouched. 



Plate 5 



PAGE 



Cauadia spinosa Walcott 4 



Figs, i, 2. Natural size and enlarged (X 4) photographs. The larger one 

 has been retouched. 



Plate 6 



PAGE 



Canadia spinosa Walcott 4 



Fig. I. (X2.) Photograph of a well preserved specimen. 



2. (X2.) Unretouched illustration of another specimen whose 

 specific identity Doctor Walcott doubted somewhat. 



Canadia sparsa Walcott 5 



Fig. 3. (X2.) Unretouched photograph of this peculiar worm. 



Canadia irregularis Walcott 5 



Fig. 4. Small, somewhat broken specimen. (See pi. 9, fig. 3. for enlarge- 

 ment.) 



5. (X2.) An unretouched photograph of the lectotype. 



6. (X 2.) Coiled specimen doubtfully referable to the species. 



Plate 7 



page 



Canadia setigera Walcott 5 



Fig. I. (X2.) Unretouched photograph of a rather complete curled 

 specimen. 



4. (X 2.) Unretouched photograph showing the attachment of the 

 setae. 



Canadia dubia Walcott 6 



Fig. 2. (X3-) A good illustration of this small form. 



Canadia irregularis Walcott 5 



Fi<^- 3- (X3-) Enlargement of specimen illustrated as fig. 4 on preced- 

 ing plate. 



