184 
CEISINA. 
Disteibtjtioh^. 
Danian: Faxoe. 
Senonian — Maastrichtian : Maastricht ; Meudon ; Chapet, Seine- 
et-Oise. 
Campanian: Eiigen. 
Coniacian or Turonian : Les Eoches, Loir-et-Cher. 
Tnronian: Lisle and Vendome, Loir-et-Cher. 
Figure. 
Fig. 14. A broken gonocyst on the reverse edge of a zoaiium, 
X 16 dia. Maastrichter Kreide : Maastricht. Van Breda Coll. 
D. 3752. 
Fig. 14 . — Crisina [Reticrisina) disticha (Goldf.). 
Affinities. 
This species has nsnally been treated as a normal ^ Idmonea^'* and 
therefore no close comparison has been made between it and the 
species referred to Reticulipor a. ^ It seems, however, to be a veiy 
close ally of the Cretaceous species hitherto assigned to Reticulipora. 
Its nearest ally is Reticrisma papyracea (Orb.), from which it differs 
in the rudimentary character of the reverse edge. From R. ohliqua 
it differs in the smaller number of zooecia in each transverse series. 
The figures of Goldf uss are here accepted as interpreted by 
von Hagenow, as has been generally done ; but I cannot avoid 
a suspicion that Goldfuss’ figurn, PI. IX. Figs. 15c, d, represents 
a fragment of Crisina marginata. TVaters^ has included von 
Hagenow’ s disticha in an Australian species, Idmonea hifrons, AVat., 
which, however, has only sKghtly compressed branches. 
^ Waters. Foss. Cycl. Austr. : Quart. Joum. Geol. Soc. vol. xl. 1880, p. 685. 
