. Bulletin of the British Museum (Natural History) Zoology. 194 R. A. TRAVERS. Fig. 14 Oreoleuciscus potanini 'Lake Form', lateral view of (Top) gravid female (317 mm SL; BMNH 1986.8.28: 187-192), (Middle) spawning male (300 mm SL; BMNH 1986.8.28: 172-186) and (Bottom) riverine juveniles (86 & 53 mm SL; BMNH 1986.8.28: 198-200). coloured with a pearly rash on their head (Davies, 1986). Sexually dimorphic females were distinguished by taut ab- dominal musculature outlining each pair of pleural ribs, hypertrophy of epaxial muscles posterior to the neuro- cranium, generally elongated snouts a

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. Bulletin of the British Museum (Natural History) Zoology. 194 R. A. TRAVERS. Fig. 14 Oreoleuciscus potanini 'Lake Form', lateral view of (Top) gravid female (317 mm SL; BMNH 1986.8.28: 187-192), (Middle) spawning male (300 mm SL; BMNH 1986.8.28: 172-186) and (Bottom) riverine juveniles (86 & 53 mm SL; BMNH 1986.8.28: 198-200). coloured with a pearly rash on their head (Davies, 1986). Sexually dimorphic females were distinguished by taut ab- dominal musculature outlining each pair of pleural ribs, hypertrophy of epaxial muscles posterior to the neuro- cranium, generally elongated snouts and concave dorsal sur- face of the head. A surprisingly large size range of spawning individuals was collected (e.g. 80-348 mm) and gut contents revealed plant (e.g. algae) and animal (e.g. insect larvae, oligochaetes and smaller individuals of their own species) remains, depending on the fishes' stage of development (see Shatunovskii, 1985: 48). Taxonomic discussion. The specimens appear to exhibit a combination of many specific characters discussed by Dashdorzh etal. (1969). Extensive interspecific variability has led many authors to reassess the composition of the genus. Most recent opinions can generally be divided between the recognition of two closely related but nevertheless distinct. 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 work.. Farn, Alexander E. London : Butterworths