. The Devonian of Missouri. Geology; Geology, Stratigraphic; Paleontologie; Devoon. Fig. 7. Sections of Gypidula marionensis Greger. 1-3. Gypidula marionensis Greger. Sections of the brachial valve showing the extent of the loop. Fig. 1 is of a different specimen than figs. 2 and 3, and is cut near the top of the valve. The dotted areas represent the cut edge of the shell. 4 and 5. Gypidula marionensis Greger. Transverse sections in front of the short median septum of the pedicle valve, showing the spondylia. Gypidula mineolaensis n. sp. Plate 23, figures 6, 10, 11 Description—Pedicle valve mo
. The Devonian of Missouri. Geology; Geology, Stratigraphic; Paleontologie; Devoon. Fig. 7. Sections of Gypidula marionensis Greger. 1-3. Gypidula marionensis Greger. Sections of the brachial valve showing the extent of the loop. Fig. 1 is of a different specimen than figs. 2 and 3, and is cut near the top of the valve. The dotted areas represent the cut edge of the shell. 4 and 5. Gypidula marionensis Greger. Transverse sections in front of the short median septum of the pedicle valve, showing the spondylia. Gypidula mineolaensis n. sp. Plate 23, figures 6, 10, 11 Description—Pedicle valve moderately convex, the summit of the convexity directly above the hingeline, from which the sides slope abruptly to the beak and cardinal margins and gently to the other margins. The umbo projects strongly beyond the hingeline. The beak is small and only slightly incurved. A very short median septum is present. The cardinal area is small and rounds imperceptably to the rest of the shell. The delthyrium is wide and low. There is no fold or sinus on the specimens collected. The valve is marked by about 30 low angular plications which extend more than half way to the beak in the middle of the shell but a much shorter distance near the margins. Only two brachial valves are in our collection, and they are imperfect. The shell is much less convex than the pedicle valve. It is marked by similar plications and has no fold or sinus. Remarks—The species resembles Gypidula multicostata Dunbar but the plications extend only a short distance on the shell; fold and sinus are not present; the plications extend to the cardinal margins, and the shell is much wider compared to the length. Occurrence—Mineola of Ralls County. Order Telotremata Superfamily Rhynchonellacea Family Rhynchonellidae Genus Camarotoechia Hall and Clarke Camarotoechia depressa (Kindle) Plate 24, figure 16. 1901. Rhynchonella depressa Kindle, Ind. Dept. Geol. Nat. Res., 25th Ann. Rept., pp. 589-590, pi. 7, figs. 5, 5a,
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectgeology, bookyear1922
