. Bulletin of the British Museum (Natural History), Geology. 220 A NEW TROCHILISCUS (CHAROPHYTA) Borders. Pteraspis leathensis White, a Dittonian Zone-fossil. Bull. Brit. Mus. {Nat. Hist.), London (Geol.) 1, 3: 51-89, pi. 5. Wood, R. D. 1947. Characeae of the Put-in-Bay Region of Lake Erie (Ohio). Ohio J. Sci., Columbus, 47: 240-258, pis. 1-4. Woods, H. 1947. Palaeontology Invertebrate. 8th ed. 477 pp., 221 figs. Cambridge. WoRSDELL, W. C. 1916. The Principles of Plant Teratology, 2. xvi + 296 pp., pis. 26-53, 155 figs. Ray Soc., London. Zych, W. 1927. Old-Red de la Podolie. Trav. Serv. Geol.


. Bulletin of the British Museum (Natural History), Geology. 220 A NEW TROCHILISCUS (CHAROPHYTA) Borders. Pteraspis leathensis White, a Dittonian Zone-fossil. Bull. Brit. Mus. {Nat. Hist.), London (Geol.) 1, 3: 51-89, pi. 5. Wood, R. D. 1947. Characeae of the Put-in-Bay Region of Lake Erie (Ohio). Ohio J. Sci., Columbus, 47: 240-258, pis. 1-4. Woods, H. 1947. Palaeontology Invertebrate. 8th ed. 477 pp., 221 figs. Cambridge. WoRSDELL, W. C. 1916. The Principles of Plant Teratology, 2. xvi + 296 pp., pis. 26-53, 155 figs. Ray Soc., London. Zych, W. 1927. Old-Red de la Podolie. Trav. Serv. Geol. Pologne, Warsaw, 2: 1-65, pis. 1-6. (Polish and French.). '^'-^—RENTED 1 - AUG 1952. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)


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