FIGURE 4 in Calcareous sponges (Porifera, Calcarea) from Ilha Grande Bay, Brazil, with descriptions of three new species

FIGURE 4. External and internal morphology of Paraleucilla perlucida sp. nov. G—Diactine; H—Cortical triactine; I—Cortical tetractine; J—Subatrial triactine; K—Subatrial tetractine; L—Subatrial II triactine; M—Subatrial II tetractine (arrow points to the apical actine); N—Atrial tetractine.