. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. AcAMiioNA, Wliite, 1862, Proo. Boat. Soc. Nat. Hist., vol. (>, p. 27. [Etv «*«', point; amb(m, Syn. for Kuinotria. prima, see Eumetria prima. , LinnarBHon, 187«, Bihangtill K. Vet. Akad. Handl., p. 20, Swed. Acad. kSci. on tlie Brncldopoda of the Para- doxides beds. [Kty. akro'», pointed; theky nipple; from tbe aj)ex of tlie valve.] Snell tldn, corneouB, subcircn- lar in outline, depressed, co
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. AcAMiioNA, Wliite, 1862, Proo. Boat. Soc. Nat. Hist., vol. (>, p. 27. [Etv «*«', point; amb(m, Syn. for Kuinotria. prima, see Eumetria prima. , LinnarBHon, 187«, Bihangtill K. Vet. Akad. Handl., p. 20, Swed. Acad. kSci. on tlie Brncldopoda of the Para- doxides beds. [Kty. akro'», pointed; theky nipple; from tbe aj)ex of tlie valve.] Snell tldn, corneouB, subcircn- lar in outline, depressed, concentrically marked, and sometimeH radiated ; apex of ventral valve teat-like; subcentral or near the posterior mar((in, perforated; dorsal valve slightly convex, posterior margin slightly roflexed, and internally a low median longitudinal septum rep- resented by an in the cast. Tyjje A. coriacea. dichotoma, Walcott, 1886, Monogr. U. S. Geo. Sur., vol. 8, p. 14, Up. Taconic. matthewi, Ilartt, 1868, (Lingula matthewi,) Acad. Geol., p. 644, St. John Gr. subrtidua. White, 1874, (Acrotreta subdsidua,) Rep. Invert. Foss., p. 6, and Geo. Sur. W. 100th Mer., vol. 4, p. 34, Up. Taconic. Aero t re ta, Kutorga, 1848, Uber die Sii)hon- otretii' aus den Ver- han d 1 u n - gen der Kaiserlich - en Miner- alogisc hen ^'^*^ (Jesellscaft fur Jahr., B260, and avidson's B r a c h i o - poda, vol. 1, p. 133. [Ety. 0^08, the top or sum* mit; treiot, perforated.] Shell triangu- ..*fc-- FlG. ele Bubskltia. In- terior of (lol'Klll valve Acrotreta Keniinn- Hraall outline tlgures natural size; a and c, doriial valves ; b, ventral valve; d, area of ventral valve,which shows a central groove ; /, area of an- other specimen having no groove; «, side view. lar, larger valve conical, false area Hat, bent back at right angles to thenunvin of the valve, longitudinally grooved along the center, and perforated ut iih extremity by a small circular aperture, the lines of
Size: 1810px × 1380px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
