Fam. 2.  EUCRATIADAE. 7.  Eucratea. 20.  E. chelata. 8.  Anguinaria. 21.  A. spatulata.

Sec. 2.  MULTISERIALARIA. 1.  Articulata. a. internodes elongated, multicellular.

Fam. 1.  SALICORNARIADAE. 9.  Salicornaria. 22.  S. punctata, n. sp. ? 23.  S. bicornis, n. sp. 24.  S. dichotoma, n. sp. 25.  S. marginata, n. sp.

Fam. 2.  CELLULARIADAE. 10.  Cellularia. 26.  C. monotrypa, n. sp. 11.  Scrupocellaria. 27.  S. cervicornis, n. sp. 28.  S. diadema, n. sp. 29.  S. cyclostoma, n. sp. 30.  S. ferox, n. sp. 12.  Canda. 31.  C. arachnoides. b. internodes short, 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.