Fig. 5_a_. Mouth with the two teeth, × 100 Fig. 5_b_. Basal part of a single tooth, × 150 Fig. 6. _Tuscarora porcellana_, John Murray, × 600 1708 Fig. 6_a_. A piece of the shell, with five pores. Fig. 6_b_. A piece of a tooth, with the internal axial rod and its transverse branches. Fig. 7. _Tuscarusa medusa_, n. sp., × 25 1709 View from the side. Fig. 7_a_. View from the mouth, × 50 Fig. 8. _Tuscaridium lithornithium_, n. sp., × 20 1710 View from the ventral side. Central capsule and calymma as in fig. 2. Fig. 8_a_. Peristome from the ventral side. Fig. 8_b_. Peristome from the right side. [Illustration: TUSCARORA.] PLATE 101. LEGION PHÆODARIA. Order PHÆOCYSTINA. Families PHÆODINIDA, CANNORRHAPHIDA et AULACANTHIDA. Fig. 1. _Phæocolla primordialis_, n. sp., × 300 1544 Central capsule, isolated. The double contoured outer membrane exhibits only one opening, with a radiate operculum and long proboscis. The granular protoplasm encloses clear spherical vacuoles. The sphæroidal nucleus contains irregular amoeboid nucleoli. Fig. 2. _Phæodina tripylea_, n. sp., × 300 1545 A central capsule in self-division, with two elliptical nuclei. The astropyle is already bisected and has two proboscides. Fig. 3. _Cannorrhaphis spinulosa_, n. sp., × 300 1552 A complete specimen with two central capsules, each of which contains two nuclei. The alveolate calymma contains a dark phæodium and is surrounded by tangential tubular needles. Fig. 4. _Cannorrhaphis spinulosa_, n. sp., × 300 1552 A single tangential tube. Fig. 5. _Cannorrhaphis spathillata_, n. sp., × 300 1552 A single tangential tube. Fig. 6. _Aulactinium actinastrum_, n. sp., × 100 1574 A complete specimen, seen in optical meridional section. In the centre the spheroidal central capsule, with its double membrane and three openings (above two lateral parapylæ, below the large astropyle with its radiate operculum). The capsule encloses numerous spherical vacuoles and two hemispherical nuclei, each with numerous nucleoli. The anterior half of the capsule is surrounded by the blackish phæodium. The spherical calymma contains numerous globular alveoles and is pierced by the radial tubes, the proximal ends of which are in contact with the surface of the central capsule (compare Pl. 103, fig. 1). Fig. 7. _Aulactinium actinastrum_, n. sp., × 300 1574 A single radial tube. Fig. 8. _Aulactinium actinelium_, n. sp., × 200 1574 A single radial tube.