. Bulletin of the British Museum (Natural History) Geology Supplement. ESPECIALLY MYCTOPHOIDS 139 support at least 15 branchiostegal rays. The first 8 rays are small and of uniform shape, the remaining 7 gradually increase in size until the terminal ones are large and flattened. The urohyal is long and formed of two laminae of bone connected dorsally. Paired fins and girdles. The pectoral girdle is like that of Halec eupterygius, but in addition a large postcleithrum projects postero-ventrally from the lower end of the supracleithrum. Eleven or 12 rays make up the pectoral fin, the first is un
. Bulletin of the British Museum (Natural History) Geology Supplement. ESPECIALLY MYCTOPHOIDS 139 support at least 15 branchiostegal rays. The first 8 rays are small and of uniform shape, the remaining 7 gradually increase in size until the terminal ones are large and flattened. The urohyal is long and formed of two laminae of bone connected dorsally. Paired fins and girdles. The pectoral girdle is like that of Halec eupterygius, but in addition a large postcleithrum projects postero-ventrally from the lower end of the supracleithrum. Eleven or 12 rays make up the pectoral fin, the first is unbranched, stout and basally ornamented with small tubercles. The pelvic bones lie below the dorsal fin and the fins are as large as the pectorals, also consisting of approximately n rays. Most of the rays are branched and ornamented in their basal regions. Vertebral column. The vertebral column is shown in the restoration of the entire skeleton in Text-figure 63. It consists of approximately 40 vertebrae, of which 18 are caudal. The centra are slightly longer than deep and mesially constricted. In the precaudal region the neural arches are easily displaced from the centra indicating the looseness of the attachment in life. Ventro-lateral transverse pro- cesses occur on the precaudal centra for the articulation of the long, thin, flattened ribs. The first two caudal vertebrae only possess haemal arches with which the ribs articulate. Both epineurals and epipleurals are present on the first 30 vertebrae. Median fins and tail. The median fins are shown in the restoration, Text-figure 63. The dorsal fin consists of 13 or 14 rays and is just within the anterior half of the back. The first finray is short, stout and unbranched with ornamentation on. Fig. 64. Halec haueri (Bassani). Caudal fin skeleton in lateral Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustr
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