B. Picton, W-Ireland
photo B. Picton
D. Guiterman
De Weerdt's (1986) cross section of skeleton
encrusting and repent growth forms
De Weerdt's (1986) branching growth form
De Weerdt's (1986) tubiform growth form
colour photo of branch by Wallie de Weerdt
Roscoff in situ photo by Mario de Kluijver
Roscoff in situ photo by Mario de Kluijver
ect. skeleton and spicule, from De Weerdt (1986)
ectosomal skeleton, photo from De Weerdt (1986)
Bowerbank's (1874) drawings