. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUI ANAS -17. Fig. 12. Opisthonema oglinum (Le Sueur). From Hildebrand 1964. filament makes Opisthonema distinguishable from Sardinella or Harengula, even in small specimens. The juveniles in batch k have a curious peculiarity in their pigmentation. In addition to the normal line of black spots along the upper flank, there is an approxi- mately circular dark brown spot, about 0-75-1-0 eye diameter in size, on the silver part of the flank just behind the gill cover. What is remarkable is that this
. Bulletin of the British Museum (Natural History). Zoology . CLUPEOID FISHES OF THE GUI ANAS -17. Fig. 12. Opisthonema oglinum (Le Sueur). From Hildebrand 1964. filament makes Opisthonema distinguishable from Sardinella or Harengula, even in small specimens. The juveniles in batch k have a curious peculiarity in their pigmentation. In addition to the normal line of black spots along the upper flank, there is an approxi- mately circular dark brown spot, about 0-75-1-0 eye diameter in size, on the silver part of the flank just behind the gill cover. What is remarkable is that this spot is present in every case only on the right side of the fish. The spot results from an absence of pigment (guanine) in this area. There is no sign of external damage and no explanation can be offered for this anomaly. LILE Jordan & Evermann, 1896 Lile Jordan & Evermann, 1896, Bull. natn. Mus., 47 (1) : 428, 429 (Type : Clupea stolifera Jordan & Gilbert). This genus contains two very closely related species, Lile stolifera (Jordan & Gilbert) from the tropical Pacific coasts of the Americas (Lower California to Peru), and the western Atlantic Lile piquitinga (Schreiner & Ribeiro) from Venezuela and Brazil. A third species, Lile platana Regan, 1917a from Rio de la Plata and Rio Roncador (Brazil) is now placed in the monotypic genus Platanichthys (Whitehead 1968). References to Lile piquitinga are very scanty. It was recorded only from Per- nambuco and Bahia (? Swainson 1839 > Schreiner & Ribeiro 1903 ; Regan 1917a ; Fowler 1942 - on previous references) until seven Venezuelan specimens from Punta de Piedras (Nueva Esparta) were reported by Cervigon (1966 : 132). The specimens from Lake Papary (39 km south of Natal, Brazil), which Starks (1913 : 8) identified as Sardinella sardina and Fowler (1942) as Harengula humeralis, are Lile piquitinga (FMNH 59071, 65 fishes). This species can probably be expected from the Guianas Please note that
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