Tuatara: Volume 7, Issue 3, June 1959
PLATE I — Fig. 1: Diagrammatic sketch of a centric diatom frustule (Coscinodiscus) in girdle view. Fig. 2: The same in valve view. Fig. 3: Diagrammatic sketch of a pennate diatom frustule (Navicula) in broad girdle view. Fig. 4: The same in valve view. (Figs. 1-4 after Cupp, 1943, Figs. A and B in part, pp. 4-5.)
PLATE I
Fig. 1: Diagrammatic sketch of a centric diatom frustule (Coscinodiscus) in girdle view. Fig. 2: The same in valve view. Fig. 3: Diagrammatic sketch of a pennate diatom frustule (Navicula) in broad girdle view. Fig. 4: The same in valve view. (Figs. 1-4 after Cupp, 1943, Figs. A and B in part, pp. 4-5.)