The complete spherical shell. Fig. 2. _Aularia ternaria_, n. sp., × 300 1621 A group of six triangular meshes, with seven nodal points of radial tubes. Behind the central capsule, with its double membrane (_e_, outer; _i_, inner) and radiate operculum (_o_); _u_, the two outer parapylæ; _v_, vacuoles in the protoplasm. The ellipsoidal nucleus (_n_) contains numerous nucleoli (_l_). Fig. 3. _Aulastrum triceros_, n. sp., × 50 1635 The complete shell. Fig. 3_a_. _Aulastrum triceros_, n. sp., × 300 1635 A single radial tube. Figs. 4_a_, 4_b_, 4_c_. _Aulastrum dendroceros_, n. sp., × 400 1635 Three single radial spines (taken from three different specimens). Fig. 5_a_. _Aulophacus lenticularis_, n. sp., × 300 1631 A single radial spine. Fig. 5_b_. _Aulophacus amphidiscus_, n. sp., × 300 1631 A single radial spine. Fig. 6. _Aulatractus fusiformis_, n. sp., × 5 1632 The complete shell, five times enlarged. Fig. 6_a_. _Aulatractus fusiformis_, n. sp., × 20 1632 Apical part of the shell. Fig. 6_b_. _Aulatractus fusiformis_, n. sp., × 400 1632 A single radial tube. Fig. 7. _Aulatractus diploconus_, n. sp., × 20 1632 Apical part of the shell. Fig. 7_a_. _Aulatractus diploconus_, n. sp., × 400 1632 A single radial tube. Fig. 8. _Auloplegma perplexum_, n. sp., × 50 1630 Half the shell. Fig. 8_a_. _Auloplegma perplexum_, n. sp., × 400 1630 A single radial tube. Fig. 9. _Auloplegma spongiosum_, n. sp., × 300 1631 A single radial tube. [Illustration: 1. AULONIA, 2-5. AULOSPHAERA, 6. 7. AULATRACTUS, 8. AULOPLEGMA.] PLATE 112. LEGION PHÆODARIA. Orders PHÆOSPHÆRIA. Family CANNOSPHÆRIDA. CANNOSPHÆRIDA. Fig. 1. _Cannosphæra antarctica_, n. sp., × 50 1640 The entire shell. The inner mammillate shell, from the month of which is prominent the phæodium, in connected by numerous radial beams with the outer shell. Fig. 2. _Cannosphæra antarctica_, n. sp., × 200 1640 The inner shell, from the mouth of which is prominent the phæodium, and a single hexagonal mesh of the outer shell, connected with the former by thin radial threads. Fig. 3. _Cannosphæra antarctica_, n. sp., × 200 1640 A single radial spine, with four terminal branches. Fig. 4. _Cannosphæra pacifica_, n. sp., × 200 1641