Fig. 6. _Conchopsis navicula_, n. sp., × 400 1727 Hinge of the shell, from the right side. Fig. 7. _Conchopsis compressa_, n. sp., × 150 1725 Lateral view from the left side. The triangular central capsule with the dark nucleus is visible. Fig. 8. _Conchopsis compressa_, n. sp., × 150 1725 Dorsal view of the upper valve with its keel. Fig. 9. _Conchopsis pilidium_, n. sp., × 80 1726 The two valves separated and seen obliquely, half from the lateral, half from the internal side. The inner opening of each valve is bordered and partly closed by a broad horizontal velum or diaphragm like the deck of a boat. [Illustration: CONCHOPSIS.] PLATE 126. LEGION PHÆODARIA. Order PHÆOCONCHIA. Family COELOGRAPHIDA. Figs. 1-1_c_. _Coelographis regina_, n. sp., 1752 Fig. 1. Lateral view. The central capsule it visible between the two valves of the inner shell, the galeæ of which are filled by the phæodium, × 20 Fig. 1_a_. Dorsal view (somewhat obliquely from the left side). The galeæ appear triangular, × 20 Fig. 1_b_. Basal view, × 20 Fig. 1_c_. Distal end of a style, × 300 Figs. 2-2_b_. _Coelodecas sagittaria_, n. sp., 1755 Fig. 2. One valve of the shell, seen from the outside, × 30 Fig. 2_a_. Distal end of a style, × 300 Figs. 3-3_a_. _Coelostylus bisenarius_, n. sp., 1756 Fig. 3. Lateral view of the bivalved shell. The central capsule is visible between the two valves of the inner shell, the galeæ of which are filled by the phæodium, × 20 Fig. 3_a_. Distal end of a style, × 300 Figs. 4-4_a_. _Coelagalma mirabile_, n. sp., 1759 Fig. 4. Dorsal view of the bivalved shell, × 30 Fig. 4_a_. Basal view of the bivalved shell, × 10 [Illustration: 1. COELOGRAPHIS, 2. COELODECAS, 3. COELOSTYLUS, 4. COELAGALMA.] PLATE 127. LEGION PHÆODARIA. Order PHÆOCONCHIA. Family COELOGRAPHIDA. Fig. 1. Coeloplegma murrayanum, n. sp., × 40 1757 One valve of the bivalved shell, seen from the inside, of the usual ovate form. Fig. 2. _Coeloplegma murrayanum_, n. sp., × 40 1757 One valve of the bivalved shell, seen from the inside, of the rarer polyhedral form, which may be distinguished as a different species (_Coeloplegma tritonis_, compare p. 1758). _h_, hemispherical inner valve; _g_, galea; _s_, its base. Fig. 3. _Coeloplegma murrayanum_, n. sp., × 40 1757