M. Macropora
Fig. 25: Part of a plant. × 1. Fig. 26: Underside of thallus. × 4. m. median scale, I. laminar scale. Figs. 27 and 28: Appendages of ventral scales, × 75. Fig. 29: Part of the thallus with a cupule. × 8. Fig. 30: Part of the rim of the cupule. × 180. Fig. 31: Gemma with 2 growing-points. × 75. Fig. 32: Gemma with 3 growing-points. × 75. Fig. 33: Transverse section of the central part of the thallus. × 75. e. epidermis, p. photosynthetic layer, s. sclerotic cell in the ventral tissue. Fig. 34: Vertical section of an air-pore. × 80. Fig. 35: Antheridiophore. × 2. Fig. 36; Part of the edge of the involucre, × 380. Fig. 37: Head of an archegoniophore from above. × 2. Fig. 38: Head of an archegoniophore from below, × 2. Fig. 39: Spore, × 380.