Publications . Plate 5 All figures approxiinatcly natural size Figure 1.—Trigonia leana Gabb. Eeproductioii of original figure of the Cretaceous, Chico gioup of Martinez, (ontra Costa County,California. Figure 2.—Trigonia Itana Gabb. Ininialure specimen from Eock Creek, WheelerCounty, Oregon. Figure 3.—Trlqomn Jeaxa Gabb. Keproduetion of innnaturo specimen figuredby Gabb. Figure 4.—Trigonia leaiia Gabb, var. wlriteaveyi, a. var. Specimen numbered12123. California Academy of Science, from Pescadero, San MateoCounty, California. Figure 5.—Trigonia. Icana Gabb. Ovate form from Iniversi

---

Publications . Plate 5 All figures approxiinatcly natural size Figure 1.—Trigonia leana Gabb. Eeproductioii of original figure of the Cretaceous, Chico gioup of Martinez, (ontra Costa County,California. Figure 2.—Trigonia Itana Gabb. Ininialure specimen from Eock Creek, WheelerCounty, Oregon. Figure 3.—Trlqomn Jeaxa Gabb. Keproduetion of innnaturo specimen figuredby Gabb. Figure 4.—Trigonia leaiia Gabb, var. wlriteaveyi, a. var. Specimen numbered12123. California Academy of Science, from Pescadero, San MateoCounty, California. Figure 5.—Trigonia. Icana Gabb. Ovate form from Iniversity of Oregon, local-ity 56, Medford, Oregon. Figure 6.—Trigonia leana Gabb. Spec-men labeled as T. gibbonana in theCondon ^lus-eum, fiom Jackson County, Oregon. [46] Plate 5

---

Size: 1843px × 1355px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

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