. Catalogue of the fresh-water fishes of Africa in the British Museum (Natural History). British Museum (Natural History); Fishes; Freshwater animals. GYMNALLABES.—CH ANN ALL ABES. 271 Under the name of G. typus, forma heterocercalis, Lonnberg, Ofvers. Forh. Stockholm, 3895, p. 184, has noticed a fish from Cameroon which differs from Gunther's description and figure in the somewhat turned up caudal fin, giving it a heterocercal appearance, and in having the pectoral spine serrated on both sides. 5. CHANNALLABES. Giintb. Ann. & Mag. N. H. (4) xii. 1873, p. 143 ; Bouleng. Poiss. B
. Catalogue of the fresh-water fishes of Africa in the British Museum (Natural History). British Museum (Natural History); Fishes; Freshwater animals. GYMNALLABES.—CH ANN ALL ABES. 271 Under the name of G. typus, forma heterocercalis, Lonnberg, Ofvers. Forh. Stockholm, 3895, p. 184, has noticed a fish from Cameroon which differs from Gunther's description and figure in the somewhat turned up caudal fin, giving it a heterocercal appearance, and in having the pectoral spine serrated on both sides. 5. CHANNALLABES. Giintb. Ann. & Mag. N. H. (4) xii. 1873, p. 143 ; Bouleng. Poiss. Bass. Congo, p. 2G3 (1901), and Proc. Zool. Soc. 1907, p. 1094. Closely allied to the preceding, but still more degraded and eel- shaped ; pectoral fin rudimentary or absent, ventral s absent. Vertebra? 107. A single species. 1. CHANNALLABES APUS. Gymnallabes apus, Giinth. t. c. p. 142. Cliannallabes apus, Bouleng. 11. cc. pp. 264 and 1094, fig. Body extremely elongate and serpentiform; length of head 10 to 14 times in total length. Head \\ to 1J times as long as broad ; occipital process acutely pointed; a sole- lg" " '^_ shaped frontal fontanelle; an oval occipital fontanelle, partly on the occipital process ; eye extremely small, nearly hidden under the skin in the adult; band of prse- maxillary teeth 3 times as long as broad ; ^^^^^^^^^^^^. Channalktbes apus. Type (P. Z. S. 1907). |. vomerine teeth pointed, forming a crescentic band which is a little narrower; nasal barbel | to § length of head ; maxillary barbel as lon°- as head or slightly shorter; inner mandibular barbel a little shorter than the nasal, outer mandibular a little shorter than the. 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). Dept. of Zoology; Boulenger, George Albert, 1858-1937. London
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