. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. EM. Text-fig. 8. Dorsal fin of Alepisaimis ferox: a, the basal elements supporting the first three dorsal rays. DM, EM, IM, depressor, erector and inclinator muscles of fin-ray (X4/5); b, the basal elements supporting the 14th and 15th dorsal rays (x 7-5). Intermuscular bones In his Classification of Fishes, Berg (1947) remarks that in the lower teleosts true intermuscular bones (epineurals, sometimes also epicentrals) are usually present. In defining the larger groups, Berg states that intermus
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. EM. Text-fig. 8. Dorsal fin of Alepisaimis ferox: a, the basal elements supporting the first three dorsal rays. DM, EM, IM, depressor, erector and inclinator muscles of fin-ray (X4/5); b, the basal elements supporting the 14th and 15th dorsal rays (x 7-5). Intermuscular bones In his Classification of Fishes, Berg (1947) remarks that in the lower teleosts true intermuscular bones (epineurals, sometimes also epicentrals) are usually present. In defining the larger groups, Berg states that intermuscular bones are present in the Isospondyli, Haplomi, Ostariophysi (Cypri- noidea) and Apodes. (Definite absence is recorded for the gadoids, Solenichthyes, Microcyprini and Percomorphi.) Intermuscular bones are also present in certain of the alepisauroid fishes. Hubbs, Mead and Wilimovsky (1953) observed the prominent development of these bones in Anotopterus and Alepi- saurus and described the complex as consisting of a series of thick dorsal elements running hori- zontally, together with more slender median bones stretching backward and slightly downward. The positions of the intermuscular bones in a transverse section across a medium-sized individual of Anotopterus pharao may be seen in Text-fig. 9 a. The pattern of intermuscular bones in Alepisaurus is remarkably similar to that found in Anotopterus. Certain of the Paralepididae and Omosudis lowei also have intermuscular bones, which are developed in both the epaxial and hypaxial parts of the myotomes. A drawing of the more conspicuous elements associated with the first three vertebrae of Omosudis may be seen in Text-fig. gb. The extraordinary 4-2. 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 Institute of Oceanographic Sciences (Great Britain); Nation
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