Plate P4. 1, 2. Azpeitia nodulifer (Schmidt) Fryxell and Sims (Samples 191-1179C-19H-4, 75–77 cm [1], and 191-1179C-18H-1, 75–77 cm [2]). 3. Azpeitia tabularis (Grunow) Fryxell and Sims in Fryxell et al. (Sample 191-1179C-19H-3, 75–77 cm). 4, 5. Azpeitia neocrenulata (Van Landingham) Fryxell and Watkins (Samples 191-1179C-2H-6, 75–77 cm [4], and 191-1179B-3H-5, 75–77 cm [5]). Scale bars = 10 Ám.