. Bulletin of the British Museum (Natural History). Zoology . i68 P. J. P. WHITEHEAD. Fig. 63. Lycengraulis batesii (Giinther). From Hildebrand 1964 (as L. barbouri). Description. Based on 13 Guyana and Surinam specimens, 122-8-257-0 mm , from batches a-e and g listed above. 14-15, D iii (n) 12-13, P i 14-15, V i 6, A iii 24 (), 25 (5), 26 (4), 27 (1), 2-4 rudimentary and 5-8 + 10-12 and 1-3 rudimentary (or combined, 9-10 + 12-13). In percentages of standard length : body depth 20-7-24-7 (larger fishes deeper), head length 21-6-23-6 ; snout length 2-6-3-4, eye d
. Bulletin of the British Museum (Natural History). Zoology . i68 P. J. P. WHITEHEAD. Fig. 63. Lycengraulis batesii (Giinther). From Hildebrand 1964 (as L. barbouri). Description. Based on 13 Guyana and Surinam specimens, 122-8-257-0 mm , from batches a-e and g listed above. 14-15, D iii (n) 12-13, P i 14-15, V i 6, A iii 24 (), 25 (5), 26 (4), 27 (1), 2-4 rudimentary and 5-8 + 10-12 and 1-3 rudimentary (or combined, 9-10 + 12-13). In percentages of standard length : body depth 20-7-24-7 (larger fishes deeper), head length 21-6-23-6 ; snout length 2-6-3-4, eye diameter 3-8-4-9 (negative allometry with ), cheek length 10-5-12-5 ; length of upper jaw 18-4-19-9 (no variation with size of fish), lower jaw length 16-9-18-6 ; pectoral fin length 16-4- 18-6 (negative allometry with ), pelvic fin length 7-5-10-0, length of anal fin base 25-9-28-8 ; pre-dorsal distance 56-5-60-7, pre-pelvic distance 39-0-43-5, pre- anal distance 58-2-64-1. Body fairly compressed, its width 2-5-3-0 times in its depth, the latter about equal to head length ; snout to occiput half or a little less than normal head measure- ment ; belly acutely rounded, with a single (pelvic) scute. Snout fairly prominent, just over half to three-quarters eye diameter ; eye covered by thin adipose tissue. Maxilla with pointed tip, projecting 0-25-0-33 eye diameter beyond 2nd supra- maxilla, reaching almost to (or just beyond, small specimens) the anterior border of the pre-operculum and the articulation of the lower jaw (Figure 64) ; lower edge of maxilla with a single series of caniniform teeth, short, more close-set and curving backwards anteriorly, the reverse in the posterior half of the jaw, the longest tooth quarter pupil diameter (teeth often invested in a sheath of tissue) ; pre-maxillae with about a dozen similar but smaller teeth ; 1st (anterior) supra-maxilla as long 1 as eye, pointed posteriorly and firmly attached to 2nd supra-maxilla, gradually broadening ant
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