ON RECENT POLYZOA. 661 
catory position of the species upon the ‘ closure’ of the tube, it would be 
mere folly to shift it merely because the shape of the zoarium differs from 
the ordinary run of Crisia. 
Locality: Curdie’s Creek, Australia. 
2. Idmonea atlantica, Forbes, op. cit. p. 683 
= Idmonea radians, Van Ben. (non Lamk.) 
= Idmonea inconstans, Stol., ‘ Bry. Orak. Bay.’ 
Localities: Orakei Bay (Stol.) ; Curdie’s Creek ; Mount 
Gambier ; Bairnsdale. 
3. 4 Milneana, D’Orb., op. cit. p. 648. 
Id., ‘Voy. dans ? Amér. Mérid.’ vol. v. D’Orb. 
= Idmonea giebeli, Stol. (Orak. Bay) 
= Idmonea giebeliana, Stol. (Orak. Bay) 
= Idmonea notomale, Busk, ‘Cat. Mar. Pol.’ 
Localities: Orakei Bay; Mount Gambier; Curdie’s. 
Creek ; Bairnsdale. 
4A. os radians, Lamk., op. cit. p. 684 
= Retepora radians, Lamk., ‘ Anim. sans vert.,’ ii. p. 183 
= Idmonea radians, Stol., ‘Bry. d. Orak. Bay.’ 
Locality: Mount Gambier. 
5. - Hockstetteriana, Stol., op. cit. p. 684, pl. xxx. figs. 12, 13 
=Crisina, id., Stol., ‘ Foss. Bry. der Orak. Bay.’ 
Localities: Orakei Bay ; Curdie’s Creek. 
6. i bifrons, Waters, op. cit. p. 685, pl. xxx. figs. 10, 11 
=(?)Tubigera disticha, D’Orb., ‘ Pal. France’ 
=(?)Idmonea disticha, Hag. 
Locality: Aldinga. ; 
f. ie aldingensis, Waters, op. cit. Addendum, p. 696. 
Locality: Aldinga. 
‘The appearance is much the same as that of Clavitubigera convexa 
(D’Orb., ‘ Pal. Fr.’ pl. 746, figs. 12-15), with the exception that the dorsal 
surface is concave.’ —A. Waters. 
8. Entalophora verticillata, Goldf., op. cit. p. 658 
= Ceriopora verticillata, Goldf., ‘ Petrifac.’ 
= Spiropora antiqua, D’Orb., ‘ Pal. Fr.’ 
= Spiropora neocomiensis, D’Orb., ‘ Pal. Fr.’ p. 708, 
pl. 784, figs. 1, 2 
= Spiropora verticillata, Novak. 
= Spiropora calamus, Gabb & Horn. 
=(?)Mitoclema cinctosa, Ulrich, ‘Amer. Pal. Bry. 
Jour. Cincin. Soe.’ v. p. 159, pl. vi. figs. 7, 7a. 
Ulrich’s Mitoclema cinctosa is undoubtedly an Entalophora, but I am 
very doubtful about its being in any sense identical with any of the other 
forms cited above by Mr. Waters. The Trenton species are related to 
the Upper Silurian species of ‘Spiropora’ described by me in the ‘ Quart. 
Jour. Geol. Soc.’ p. 55, Feb. 1882; but when describing these forms, 
I was unable to identify any of the Paleozoic with Jurassic or Cretaceous 
forms. I have allowed Mr. Waters’s suggestion to stand as above, but have 
simply placed (f) before it. 
Other synonyms will be found in Novak and D’Orbigny. 
Locality: Mount Gambier. 
