Page:Walcott Cambrian Geology and Paleontology II.djvu/330

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228

SMITHSONIAN MISCELLANEOUS COLLECTIONS

VOL. 57

DESCRIPTION OF PLATE 34
				PAGE
Hurdia triangulata Walcott				186
	Fig.	1.	(Natural size.) Typical form of valve (right). U. S. National Museum, Catalogue No. 57721.
Odaraia alata Walcott				188
	Fig.	2.	(Natural size.) A right valve with the end of the abdomen and two cercopods projecting from posterior end. The latter are evidently displaced. U. S. National Museum, Catalogue No. 57722.
Anomalocaris gigantea Walcott				180
	Fig.	3.	(Natural size.) Portion of the abdomen showing segments and appendages. U. S. National Museum, Catalogue No. 57723.

All of the specimens illustrated on Plate 34 are from locality (35k) 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.) northeast of Burgess Pass, above Field, British Columbia.