Plate 36
The 100 µm scale bar applies to all figures.
Figs. 1-6. Heliodiscus asteriscus, showing slight irregularities in shell shape (esp. fig. 3) and a large range of spine morphology. Fig. 1, 2: forma viminalis , fig. 3: forma echiniscus, fig. 5: forma asteriscus; fig. 6: forma appolnis. All from BSS: 28B(II), 26B(F) EF C36, 28B(II), 28B(VII/1576), 28B(II) and 34B(F) EF D25. |
