40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



Plate 8 



PAGE 



Canadia dnbia Walcott 6 



Fig. I. A fairly large specimen. 



2. (X2.) A specimen showing the intestinal tract. 



Canadia setigera Walcott 5 



Fig. 3. (X3-) Retouched figure of a specimen showing the bundles of 

 spines particularly well. 



Pikaia gracilcns Walcott 7 



Fig. 4. (X2.) A wide specimen. The illustration is slightly retouched. 

 5. (X2.) Another rather well preserved example. 



Plate 9 



PAGE 



Ottoia minor Walcott 6 



Fig. I. (X2.) A short form that may have its shape because the mouth 

 parts are retracted. 



2. (X2.) Small specimen, showing intestinal tract, doubtfully 



referred to the species. 



3. (X 2.) Apparently the anterior end of a poorly preserved indi- 



vidual. 



4. (X2.) Another form like fig. 2. 



5. (X2.) A specimen with a peculiar restriction that may be 



accidental. 

 6, 7. Retouched photographs of a particularly fine individual. The 

 whole specimen is enlarged somewhat (X i-5) and the an- 

 terior end considerably (X4)- 



Canadia dnbia Walcott 6 



Fig. 8. (X2.) Unretouched photograph ot a small individual. 



Canadia simplex, new species 6 



Fig. 9. (X3-) Retouched photograph of the holotype. 



Canadia grandis, new species 5 



Fig. 10. (X2.) Retouched figure of the holotype. 



Plate to 



page 



Selkirkia major (Walcott) 7 



Fig. i. (circa X3-5-) A large individual, possibly preserving the origi- 

 nal proportions of the shell. 

 2. (circa X3-5-) Another specimen whose shell is more or less 

 crushed, hut with even better preservation of the soft parts. 



