SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 68 



quarry," discovered by him in 1910. Fifty days were spent at the 

 Burgess Pass camp, 3,000 feet above Field, British Cohimbia, where 

 with the assistance of a miner and assistant, and packer Mitton, a 

 section in the quarry of about 180 square feet was taken out. 

 This practically exhausts a quarry which has given the finest and 



Fic. b. 



Fig. 7. 



Figs. 6 and 7. — (About two-thirds natural size.) Another and larger 

 holothurian with tube feet. (Portalia mira, new genus and species Wal- 

 cott) that is finely preserved although crushed flat in the shale. An actinian 

 {Mackenzia costalis) is lying on the posterior portion of the holothurian. 



largest series of Middle Cambrian fossils yet discovered, and the 

 finest invertebrate fossils yet found in any formation. More than one 

 and a half tons of specimens were trimmed out at the quarry with 

 the assistance of Mrs. Walcott and packer Mitton, wrapped in 

 bundles carried by pack horses to camp and thence to the railroad 



