. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. DENISON: THE CYATHASPIDIDAE 365 Occurrence.—Late Silurian (Early Ludlovian), glacial erratic of Graptolithengestein, Muntzeschen quarry, Kothen, Saxony, Germany. cep—^*-. Fig. 113. Archegonaspis schmidti, rostral view, drawn from cast of type speci- men (X 3). cep, central epitegum; lep, lateral epitegum; orb, orbit; pop, preorbital process; rep, rostral epitegum; ro, rostrum. Archegonaspis ludensis (Salter) Pteraspis ludensis Salter, 1859, Ann. Mag. Nat. Hist., (3), 4, pp. 45-47, fig. 1. Scaphaspis lu
. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. DENISON: THE CYATHASPIDIDAE 365 Occurrence.—Late Silurian (Early Ludlovian), glacial erratic of Graptolithengestein, Muntzeschen quarry, Kothen, Saxony, Germany. cep—^*-. Fig. 113. Archegonaspis schmidti, rostral view, drawn from cast of type speci- men (X 3). cep, central epitegum; lep, lateral epitegum; orb, orbit; pop, preorbital process; rep, rostral epitegum; ro, rostrum. Archegonaspis ludensis (Salter) Pteraspis ludensis Salter, 1859, Ann. Mag. Nat. Hist., (3), 4, pp. 45-47, fig. 1. Scaphaspis ludensis Lankester, 1868, Fishes Old Red Sandstone, Mon. Pal. Soc, p. 25, pi. 2, figs. 4, 4a. Cyathaspis ludensis Woodward, 1891, Cat. Fossil Fishes Brit. Mus. (Nat. Hist.), 2, p. 173. Archegonaspis ludensis Kiaer, 1932, Skr. Svalbard Ishavet, 52, p. 24; White, 1958, Studies on Fossil Vertebrates, Westoll ed., p. 218. Type.—Ventral shield, Geological Survey and Museum, London, 49106. Occurrence.—Late Silurian (Middle Ludlovian), highest Lower Leintwardine beds, (according to Dr. J. D. Lawson, in litt.) Church Hill, Leintwardine, Herefordshire, England. Diagnosis.—The length of the ventral shield is about 38 mm. The dentine ridges are of uniform size. The reference of this species to Archegonaspis is not firmly established. Archegonaspis schmidti (Geinitz). Figure 113. Cyathaspis schmidti Geinitz, 1884, Zeits. Deutsch. Geol. Ges., 36, pp. 854-857, pi. 30; Roemer, 1885, Palaeont. Abh., 2, p. 132. (?)Cyathaspis schmidti Woodward, 1891, Cat. Fossil Fishes Brit. Mus. (Nat. Hist.), 2, p. 173. Archegonaspis integer var. schmidti Kiaer, 1932, Skr. Svalbard Ishavet, 52, p. 24. Aequiarchegonaspis schmidti Stensio, 1958, Traite de Zool., 13, fasc. 1, p. 307, fig. 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 w
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