DITAXIA. 
407 
DlSTEIBrXIOX. 
Senonian — Maastrichtian : Maastricht ; Geulem ; Bemeleu ; Meudon ; 
Eoyan. 
Santonian: Saintes, etc,, Charente-Inferieure. 
Coniacian: Tours, Maune, and Joue, Indi-e-et-Loire. 
Tui’onian or Coniaciau: Yendome, Yillavard, Lavardin, etc., Loir- 
et-Cher. 
LIST OF SPECBIE^S-S. 
D. 6456. Two specimens (on slide) . Maastrichter Kreide. Bemelen. Busk Coll. 
D. 3763. Two specimens (on slide). IMaastrichter Kreide. Geulem. Gamble Coll. 
D. 3340. A broad frond. Maastricbter Kreide. Maastricht. Van Breda Coll. 
rXEEPEESEXTED AND DOIJBTFEL SPECIES. 
1. ?cretacea (von Hagenow), 1851. 
Syn. Xeuropora cretacea, von Hagenow, 1851. Bry. Maastr. Kr. p. 48, pi. iii. 
fig. 10, 
Folytaxia ,, Hamm, 1881. Bry. mastr. Ob. -Sen. p. 41. 
DisTiiin. — Maastrichtian : Maastricht. ? Cenomanian : Essen. 
Aff. — This may be a coral (non-madi’eporarian). Hamm includes as s}Tionyms 
the Filicava trigona of Goldfuss and Simonowitsch and Filicava triangularis 
of d'Orbigny. Microscopic examination is necessary. 
2. biseriata, Pocta, 1892. 
Syx. Bitaxia biseriata, Pocta, 1892. Mech. Koryc. Hory : Ceska Ak. Fr. Jos. 
Braze, sect, ii. p. 25, fig. 16, pi, iv. figs. 3, 4. 
Distrib. — Cenomanian : Kank, Bohemia, in Korycaner Schichten. 
Aff. — Probably a new genus of Petaloporidae. 
3. ? multicincta, von Eeuss, 1872-3. 
Syn. Bitaxia multicincta, Bry. uut. Quad.: Palseontogr. 
vol. XX. pt. 1, p. 131, pi. xxxii. figs. 13-19. 
Char. — Branches narrow dichotomous fronds. Apertures large, oval. Dacty- 
lethrse (? maculm) in a single circle roimd each aperture, or more numerous. 
Distrib. — Cenomanian ; Plauen, Saxony. 
4. tubulosa (d’Orbigny), 1853. 
Syx. Semicrescis tubulosa, d’Orbigny, 1853-4. Biy. Cret. p. 1073, pi. 799, 
figs. 8-io. 
Bitaxia ,, Pergens, 1890. Eevision, p. 337. 
Char. — A hollow, tubular zoarium. Apertures regularly arranged. Dactylethrae 
mostly in single series round each aperture. 
Distrib. — Senonian — Maastrichtian : Saiute - Colombo, Manche ; Eoyan, 
Charente - Inf erieure. 
Aff. — Included here fide Pergens. From d’Orbigny’s figures it is not certain 
whether there are dactylethrie or maculm. 
