A, A hydriform person giving rise to medusiform person by budding from th margin of the disk; B, free swimming medusa (Steenstrupia of Forbes) detached from the same, with manubrial genitali.
Ocelli are seen at the base of the tentacles, and also (as an exception) groups of medusiform buds.
B, The long manubrium, bearing medusiform buds; a, mouth.
Medusiform person or medusa.
I, The horny cup or hydrotheca of the hydriform persons; 1, medusiform person springing from m, a modified hydriform person (blastostyle); n, the horny case or gonangium enclosing the blastostyle and its buds.
- Diagram showing possible modifications of medusiform and hydriform persons of a colony of Siphonophora.