Fig. 8. _Aulosphæra triodon_, n. sp., × 400 1623 A single radial tube. Fig. 9. _Aulosphæra trifurca_, n. sp., × 400 1626 A single radial tube. Fig. 10. _Aulosphæra cruciata_, n. sp., × 300 1624 A single radial tube. Fig. 11. _Aulosphæra bisternaria_, n. sp., × 300 1624 A single radial tube. Fig. 12. _Aulosphæra bisternaria_, n. sp., × 600 1624 Distal end of a single radial tube. [Illustration: AULOSPHAERA.] PLATE 110. LEGION PHÆODARIA. Order PHÆOSPHÆRIA. Family AULOSPHÆRIDA. Fig. 1. _Auloscena mirabilis_, n. sp., × 50 1628 The complete shell, representing a regular latticed sphere, which is composed of equal hexagonal pyramids; the top of each pyramid bears a radial tube with a terminal corona. Fig. 2. _Auloscena mirabilis_, n. sp., × 600 1628 Terminal corona of a single radial tube. Fig. 3. _Auloscena penicillus_, n. sp., × 200 1629 A single tent-shaped elevation or six-sided pyramid, bearing on the top a brush-shaped radial tube. Fig. 4. _Auloscena flammabunda_, n. sp., × 400 1629 A single radial tube, with a centripetal free prolongation at the base and a verticil of undulate terminal branches at the distal end. Fig. 5. _Auloscena serrata_, n. sp., × 600 1630 Terminal corona of a single radial tube. Fig. 6. _Auloscena tentorium_, n. sp., × 400 1628 A single radial tube, with a centripetal prolongation at the base and a terminal corona at the distal end. Fig. 7. _Auloscena gigantea_, n. sp., × 400 1629 Basal part of a radial tube, exhibiting the internal axial thread and its connection with the six tubes, which form the edges of a flat six-sided pyramid (usually more elevated than the figure exhibits). Fig. 8. _Auloscena spectabilis_, n. sp., × 400 1628 Apex of an abnormal pyramid (sometimes occurring), in which seven radial tubes are united, instead of six. Fig. 9. _Auloscena spectabilis_, n. sp., × 800 1628 Basal part of a radial tube, in the top of a flat six-sided pyramid; above it the distal part of the same tube with its terminal corona (middle part of the tube wanting). Fig. 10. _Auloscena verticillus_, n. sp., × 300 1629 Apex of a six-sided pyramid, seen from the inside. Fig. 11. _Auloscena verticillus_, n. sp., × 400 1629 Distal part of a single radial tube, with the terminal corona. [Illustration: AULOSCENA.] PLATE 111. LEGION PHÆODARIA. Order PHÆOSPHÆRIA. Family AULOSPHÆRIDA. Fig. 1. _Aulonia hexagonia_, n. sp., × 30 1634