Publications . Plate 6 All figures ajiproxinuitely natural size Figure 1.—Trigonia leana Gabb. Internal mold of specimen from Universityof Oregon, locality 88, rrooked River, Oregon. Figure 2.—Trir/oiiia lecuia var. irhiieavesi u. var. KeproUuction of originalfigure by Whiteaves of an unnamed form from the Haida Cretace-ous, Queen Charlotte Island. Figure 3.—Triijonid fitchi. n. sp. Type specimen. Upper Cretaceous, Chicoformation of Crififin Creek, Jackson County, Oregon. [48] Plate 6.

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Keywords: ., bo, bookcentury1900, bookdecade1920, bookpublishernp, bookyear1921