drawing of shell in lateral and ventral view
swimming animal in dorso-lateral view, colour photo
dorsal view of shell, photo
drawing of young adult shell in ventral view
photo of shell in ventral view
line drawing of the fully developed juvenile (17 to 20 days old) to show the growth lines in , the shell
swimming specimen in ventral view, colour photo
lateral spine in detail, photo
swimming specimen in ventral view, colour photo
aperture of the shell from ventral view, in detail, photo
ribs of ventral side in detail, SEM photo
upper aperture lip in detail in dorsal view, SEM photo
base of ventral rib in detail, SEM photo
active swimming specimen seen from ventral, the balancers are fully expanded, colour photo
living older juvenile in ventral view, colour photo
living small juvenile in ventral view, colour photo
living specimen in posterior view, colour photo
drawing to show the feeding with a mucous web
gizzard plates, SEM photo (after Richter)
protoconch striation near the closing fold of protoconch II, SEM photo
the calcareous structure of the closing fold, SEM photo
distribution map, , The development of the shell in this genus is compared to that in Cavolinia in the next two illustrations:
