. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUI AN AS 75. Fig. 22. Odontognathus mucronatus (Lacepede). From Hildebrand 1964. allometry with ), lower jaw length 7-1-8-9 ; pectoral fin length 18-1-20-8, length of anal fin base 51-6-56-7 ; pre-dorsal distance 69-4-73-0 (777), pre-anal distance 45-1-50-0. Body highly compressed, its width four times in its depth, the latter a little greater than head length ; belly strongly keeled, the scute series beginning just behind isthmus but interrupted below pectoral fin base, to continue after a g
. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUI AN AS 75. Fig. 22. Odontognathus mucronatus (Lacepede). From Hildebrand 1964. allometry with ), lower jaw length 7-1-8-9 ; pectoral fin length 18-1-20-8, length of anal fin base 51-6-56-7 ; pre-dorsal distance 69-4-73-0 (777), pre-anal distance 45-1-50-0. Body highly compressed, its width four times in its depth, the latter a little greater than head length ; belly strongly keeled, the scute series beginning just behind isthmus but interrupted below pectoral fin base, to continue after a gap equal to just over eye diameter, the scutes beginning spine-like and hooked but ending as broad but non- serrated plates (Figure 22). Eye diameter about equal to snout length. Maxillary reaching to gill cover in fishes over about 130 mm but showing strong positive allometry with head length (and ) ; pre-maxillae with a single row of about a dozen small conical teeth on each side, separated by an edentulous notch' equal to one-third pupil diameter ; hypo-maxillae absent, the distal tips of the pre-maxillae joined to the maxillae by a ligament ; maxillae broadly expanded towards midpoint but rapidly tapering posteriorly, a fine series of denticulations running along entire lower edges ; two supra-niaxillae, the 2nd (posterior) pointed posteriorly, the 1st ovoid and half length of expand portion of 2nd (Figure 23). Lower jaw rising steeply in first third of jaw, its depth i-66 in its length, projecting somewhat beyond tip of snout ; up to six small conical teeth on either side of symphysis. Fine granular teeth on tongue and endo-pterygoid but few or none on ecto-pterygoid and palatines. Opercular series as in Figure 23. Operculum about 1-25 times as deep as broad, lower margin so firmly attached to sub-operculum that the junction between the two is difficult to find ; posterior margin of operculum thin, often damaged, but with triangular fleshy extension in complete sp
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