... as respiratory organs in amphioxus (lancelets). The volume of the stereologically evaluated specimens was determined using the Cavalieri principle ( Michel and Cruz-Orive, 1988 ), which estimates volume as the total cross-sectional area multiplied by the distance between the sections. For this purpose, just...

...M. Dale Stokes ABSTRACT The ontogeny of locomotion in the Florida lancelet ( Branchiostoma floridae ) is described for the early developmental stages through to metamorphosis. Recently hatched larvae swam at speeds up to 1 mm s −1 using their epidermal cilia; this speed decreased to approximately...