Publications . Plate 3 All figures approximately uatural size Figure 1.—Trigoiiia cJiaiiottensis, n. sp. Type sjjeciiiien belonging to Dr. C. , Victoria, B. C. Upper Cretaceous, Haida formation ofMaude Island, Queen Charlotte Islands, B. C. Figure 2.—Trlffoxia doroscliiiii Eiclnrald. Rejiroduction of the original figureof the type presumably from the ^Middle Jurassic of Inskin Bay,Cook Inlet, Alaska. Figure 3.—Trigonia doroschhd Eielnvald. Eeproduction of the original figure of the 4.—Trigonia diversicostaia Whitcaves. Eeproduction of tlie type speci- n:en. Upper Cretaceo

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Publications . Plate 3 All figures approximately uatural size Figure 1.—Trigoiiia cJiaiiottensis, n. sp. Type sjjeciiiien belonging to Dr. C. , Victoria, B. C. Upper Cretaceous, Haida formation ofMaude Island, Queen Charlotte Islands, B. C. Figure 2.—Trlffoxia doroscliiiii Eiclnrald. Rejiroduction of the original figureof the type presumably from the ^Middle Jurassic of Inskin Bay,Cook Inlet, Alaska. Figure 3.—Trigonia doroschhd Eielnvald. Eeproduction of the original figure of the 4.—Trigonia diversicostaia Whitcaves. Eeproduction of tlie type speci- n:en. Upper Cretaceous. Figure 5.—Trigonia obJiqua Hyatt. Lectotype nund:)er 32479 U. S. NationalMui-enm. Middle Jurassic, Bicknell sandstone, Cali-fornia. Figure 6.—Trigonia obliqua Hyatt. Muld of type n:aterial. 42] Plate 3.

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