Laubuka trevori predorsal scales; aw s well as 5+4+2 teeth on the fifth ceratobranchial bone. "L. trevori" has 14½–15½ branched rays in its anal fin, a relatively short pelvic fin which is about a fifth as long as tits standard length and it has two stripes running along its body: one a golden and the other a blue-green stripe which runs from behind the operculum to the peduncle of the caudal fin which is broken and less distinct towards the head than the golden stripe. Laubuka trevori Laubuka trevori is a species of small fish of the minnow and carp family, Cyprinidae,
Operculum (gastropod) seals the shell, it can also serve as a protection against predators when the snail body is retracted. In life, the operculum is attached at the ending of the columellar muscle with an opercular disc dorsally to the upper surface of the posterior part of the foot. However, in "Buccinum" a layer of long cylindrical epithelial cells, with mostly distinct nuclei, and long divided processes enter between the muscular fibres. The operculum, a cuticular development of these cells, is composed, as may be seen in the corneous opercula of "Murex", "Purpura", "Triton", of very thin superimposed layers. The cylindrical cells