“…Acarine respiratory systems have been studied extensively with the aid of the SEM (Hinton, 1971;Woolley, 1972;Witalinski, 1979;Pugh et al, 1987Pugh et al, , 1988Pugh et al, , 1991. In this technique, (usually) alcohol-fixed material is rehydrated, fractured with a sharp blade, possibly ultrasonically cleaned, then air, critical point or freeze dried, mounted, gold coated and viewed in the SEM.…”