. Bulletin of the British Museum (Natural History), Geology. nci] ethc D Fig. 20. a. Acipenser slurio Linnaeus. Recent, b. Birgeria groenlandica Stensio. Lower Triassic. After Nielsen, 1949. c. Haplolepis tuberculata (Newberry). Upper Carboniferous. After Westoll, 1944. d. Polypterus senegalus Cuvier. Recent. Partly after Jarvik, 1942. IV. SUMMARY This paper is intended as a clearing of the ground for a revision of the palaeoniscoid fauna of the British Carboniferous. The type species of four genera from this fauna are redescribed, and for comparative purposes members of four
. Bulletin of the British Museum (Natural History), Geology. nci] ethc D Fig. 20. a. Acipenser slurio Linnaeus. Recent, b. Birgeria groenlandica Stensio. Lower Triassic. After Nielsen, 1949. c. Haplolepis tuberculata (Newberry). Upper Carboniferous. After Westoll, 1944. d. Polypterus senegalus Cuvier. Recent. Partly after Jarvik, 1942. IV. SUMMARY This paper is intended as a clearing of the ground for a revision of the palaeoniscoid fauna of the British Carboniferous. The type species of four genera from this fauna are redescribed, and for comparative purposes members of four Devonian and two Permian genera are redescribed. Three new palaeonisciform families are erected. They are the Cosmoptychiidae, closely allied to the Acrolepidae of Aldinger (1937) ; the Rhabdolepidae, a family fairly close to the Elonichthyidae of Aldinger (1937), and the Stegotrachelidae. The family Tegeolepidae is shown to be intermediate in structure between the Palaeonisciformes and the Chondrosteiformes. A new genus Mesonichthys is erected for Elonichthys aitkeni Traquair (1886), and a new species, R. saarbrueckensis, is added to the genus Rhabdolepis Troschel (1857).. 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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