hort, 2-4 celled.
13. Emma.
32. E. crystallina.
33. E. tricellata, n. sp.

2. Inarticulata.

Fam. 3. BICELLARIADAE.
14. Bicellaria. 1
34. B. tuba, n. sp.
35. B. gracilis, n. sp.
36. B. grandis, n. sp.
37. B. flexilis, n. sp.
15. Acamarchis.
38. A. neritina.
39. A. tridentata.

Fam. 4. CABEREADAE.
16. Caberea.
40. C. rudis, n. sp.
41. C. zelanica.
42. C. lata, n. sp. ?

Fam. 5. FLUSTRADAE.
17. Flustra.
43. F. pyriformis ?
44. F. denticulata, n. sp.
18. Retepora.
45. R. cornea, n. sp. ?
46. R. cellulosa.
47. R. ctenostoma, n. sp.
19. Eschara.
48. E. lichenoides.
20. Diachoris, n. g.
49. D. crotali, n. sp.

Fam. 6. CELLEPORIDAE.
21. Cellepora.
50. C. bilabiata, n. sp. ?

Fam. 7. GEMELLARIADAE.
22. Didymia, n. g.
51. D. simplex, n. sp.
23. Dimetopia, n. g.
52. D. spicata, n. sp.
53. D. cornuta, n. sp.

Suborder 3. CTENOSTOMATA. (Vesicularina, etc.)

Fam. 1. VESICULARIADAE.
24. Amathia.
54. A. biseriata.

Suborder 1. CYCLOSTOMATA.

Fam. 1. TUBULIPORIDAE.

1. TUBULIPORA, Lamarck.

1. T. phalangea, Couch.
Habitat: Bass Strait, 45 fathoms.

A small, imperfect specimen, which may be referred to the variety noticed
in British Zoophytes, and figured Plate 46, figures 3, 4.

2. PUSTULIPORA, Blainville.

1. P. australis, n. sp.
P. deflexa ? Couch.

Branched dichotomously; branches short, incrassated, truncate. Cells
wholly immersed, or about half free, numerous; surface minutely
papillose, summits of papillae of a dark brown or black colour.

Habitat: Bass Strait, 45 fathoms; and elsewhere in the Australian seas.

About half an inch high. The stem becomes thicker as it ascends, and
divides into two equal short branches, each of which again subdivides
into two short truncate branches, in a plane at right angles to the
primary division. The cells in the upper part of the stem appear free for
nearly half their length, and are gently curved outwards. The surface is
covered with pretty regularly and quincuncially arranged minute papillae,
the apex of each of which is flattened or rounded, and of a dark brown or
black colour. The mode of subdivision of the polyzoary, and the truncated
ends of the branches, and the more numerous cells, suffice to distinguish
this species from P. proboscidea. The cells in the figure of P. deflexa
appear to be much more slender in proportion, and the branches in that
species are not truncated, but attenuated at the
extremity.

3. IDMONEA, Lamouroux.

1.