The frontmost is larger, the next four are about equal in size, and the sixth is smaller.
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During the furcilia stages, segments with pairs of swimmerets are added, beginning at the frontmost segments.
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If the subject matter is a landscape, you may consider putting the frontmost object at or slightly behind the surface of the screen.
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Brachiopod lophophores are non-retractable and occupy up to two-thirds of the internal space, in the frontmost area where the valves gape when opened.
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During the furcilia stages, segments with pairs of swimmerets are added, beginning at the frontmost segments, with each new pair only becoming functional at the next moult.
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The frontmost locomotive is driven by three officers, and the two other engines right behind the front locomotive are driven by two enlisted personnel each.
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However, the frontmost and rearmost sections are not regarded as true segments as they do not contain the standard sets of organs and do not develop in the same way as the true segments.
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This type of larva has a ciliated frontmost lobe that becomes the body and lophophore, a rear lobe that becomes the pedicle, and a mantle like a skirt, with the hem towards the rear.
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The High Speed Trains used on the London services are longer than the station, and so passengers in the frontmost carriage have to go to a different carriage to disembark.
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More examples
Foremost: preceding all others in spatial position; "the foremost compartment of the ship"