224 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



DESCRIPTION OF PLATE 3^ 



PAGE 



Hymenocaris obliqua Walcott 185 



Fig. I. ("Natural size.) Side view of the type specimen of the species, 

 showing carapace, abdomen, and cercopods. U. S. National 

 Museum, Catalogue No. 57710. 



2. (Natural size.) Side view of the left valve of the carapace com- 



pressed so as to shorten it. U. S. National Museum, Cat- 

 alogue No. 5771 1. 



3. ("Natural size.) Side view of a right valve that has been com- 



pressed so as to shorten it a little. U. S. National Museum, 

 Catalogue No. 57712. 



Hymenocaris ? circularis Walcott 184 



Fig. 4. (X3-) A somewhat distorted valve with a number of legs pro- 

 jecting below its margin. U. S. National .Museum, Catalogue 

 No. 57713- 



Hymenocaris ovalis Walcott 185 



Fig. 5. (X3) Side view of the right valve showing the general form. 

 U. S. National Museum, Catalogue No. 57714. 

 6. (X3) Dorsal view of a carapace, abdomen, and two cerco- 

 pods. U. S. National Museum, Catalogue No. 57715. 



Hymenocaris ? parva Walcott 185 



Fig. 7. (X4.) Type specimen of the species and genus, showing 

 several appendages and the abdomen turned forward on the 

 carapace. U. S. National Museum, Catalogue No. 57716. 



Fieldia lanceolata Walcott 188 



Fig. 8. fXs.) Side view, left valve, of the type specimen, illustrating 

 characters described. U. S. National Museum, Catalogue 

 No. 57717- 



Hiirdia victoria Walcott 186 



Fig. 9. ("Natural size.) Side view of the left valve. U. S. National 

 Museum, Catalogue No. 57718. 



All of the specimens illustrated on Plate 32 are from locality C35k) Middle 

 Cambrian : Burgess shale member of the Stephen formation, on the west slope 

 of the ridge between Mount Field and Wapta Peak, one mile (1.6 km.) north- 

 east of Burgess Pass, above Field, British Columbia. 



