BRYOZOA FROM AUSTRALIA. 685 
The ovicells are unknown, but in J. radians they occur at the 
bifurcation as an elongate raised protuberance, with very large 
pores on the front, between which there are irregular ridges ; at 
the sides there are two large areas surrounded by a double line, and 
these areas are perforated by a very large number of minute pores. 
I am doubtful whether Crisina Hochstetteriana, Smitt, from 
Florida, is identical with the fossil, though it is, at any rate, closely 
allied to it; but neither of these are closely allied to L. marionensis, 
Busk. 
Loc. Orakei Bay (Stol.); Curdies Creek, Bairnsdale. 
6. IpmMonzEa BIFRONS, noy. sp. Pl. XXX. figs. 10, 11. 
Tubigera dasticha, d’Orb. Pal. Fr. p. 723, pl. 746. figs. 2-6. 
Idmonea distucha, Hag. Bry. Maastr. p. 30, pl. i. fig. 8. 
Zoarium nearly round, slightly compressed laterally, with series 
of 7-10 zocecia on each side of two mesial lines, one of which must 
be considered as on the front, the other on the dorsal surface, series 
0-7 millim. apart ; zocecia fairly exserted, diam. 0:1 millim. 
The genus Tubigera was made by d’Orbigny for forms of which 
this is the most typical, and there seems to have been much confusion 
concerning that genus and also this species ; for it is not the same as 
the Idmonea named disticha by Goldfuss, Reuss, Manzoni, or 
Michelin. If the genus Yubigera is retaied, then perhaps Bisid- 
monea, d’Orb., should be joined with it. The figure of [dmonea 
(Retepora) disticha, Goldf., apparently relates to two or three species, 
but certainly not the present; and subsequently d’Orbigny calls the 
Idmonea disticha of Reuss Crisina disticha, so that he uses the 
specific name in two of his genera; but now both are considered to 
belong to Zdmonea. 
This looks like a connecting-link between the Spiropora form of 
Entalophora and typical Idmonee. It differs from most Jdmonew 
by the series nearly meeting at the back, so that there is no dorsal 
surface. 
Loc. Les Loches (Loir-et-Cher) (d’Orb.); Maestricht (Hag.), 
Aldinga. 
7. ENTALOPHORA VERTICILLATA, Goldf. 
Ceriopora verticillata, Goldt. Petr. Germ. i. p. 36, pl. i1. fig. 1. 
Spiropora antiqua, d’Orb. Pal. Fr. p. 710, pl. 615. figs. 10-18, 
pl. 745. figs. 15-19. 
Spiropora neocomensis, d’Orb. loc. cit. p. 708, pl. 784. figs. 1, 2. 
Spiropora verticillata, Novak, “ Beitr. z. Kenntn. der Bry. der 
bohm. Kreide,” Denkschr. k. k. Akad. Wien, vol. xxxvu. p. 34, 
pl. viii. figs. 7-12. 
Spiropora calamus, Gabb & Horn, Monogr. Foss, Polyz. Second. 
and Tert. Form. of N. America, p. 166, pl. xxi. fig. 55. 
Mitoclema cinctosa, Ulrich, Amer. Pal. Bry. Journ. Cincinn. Soe. 
Nat. Hist. vol. v. p. 159, pl. vi. figs. 7, 7 a. 
For further synonyms see d’Orbigny and Novak. 
Specimens in the collections of the Geological Society and of 
