On Lacaille’s original 1756 planisphere Antlia was shown as a simple single-cylinder pump for evacuating a glass jar and was named la Machine Pneumatique. This illustration comes from a copy of Lacaille’s planisphere published in the Atlas Céleste of Jean Fortin. Lacaille Latinized the name to Antlia Pneumatica on the second edition of the planisphere in 1763, although the depiction remained unchanged. For a zoomable version of the second edition, see here.
(Image © Ian Ridpath.)