Fig. 11 in Boring bryozoans: an investigation into the endolithic bryozoan family Penetrantiidae

Fig. 11 Schematic drawing of all members of the family Penetrantiidae. In the upper row are the autozooids and below the corresponding gonozooid where information was available. a Penetrantia densa according to Silén (1946). b P. concharum from Sweden. c P. brevis according to Silén (1946). d P. parva from northern New Zealand. e P. sileni according to Soule (1950). f P. irregularis from southern