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ZONITULID^. 
3. Multizonopora ligeriensis, d’Orbigny, 18.53. 
Synonymy. 
Multizonopora ligeriensis, d’Orbigny, 1853. Bry. Cret. p. 927, pi. 772, figs. 1-6. 
Heteropor% ,, Pergens, 1890. Rev. p. 374. 
,, ,, Pergens, 1893. Bry. St. Pat.; Bull. Soc. beige Geol. 
vol. vi., Pr. Vb. p. 208. 
non ,, {M.) ,, Vine, 1893. Compl. Rep.: Rep. Brit. Assoc. 1892, 
p. 311. 
,, , ,, Canu, 1900. Geol. Romorantin : Bull. Soc. gcol. 
France, ser. 3, vol. xxviii. p. 102. 
Zonopora ,, Canu, 1903. Faune Craie Villedieu : op. cit. ser. 4, 
vol. iii. p. 266. 
DliGNOSrs. 
Zoarium of long, thick branches, 3-12 mm. in diameter. The 
branches dichotomize and their surface is slightly pustular. 
Apertures in alternate bands, which are sometimes wedge- 
shaped and sometimes irregular ; the bands may contain up 
to three rows of apertures. Broad intervening ureas occupied 
by mesopores. 
Distkibution. 
Senonian — Santonian ; Romorantin, Loir-et-Cher. 
Coniacian : Yendome, Villedieu, and Lavardin, Loir-et-Cber ; 
St. Paterne, Tours, and St. Christophe, Indre-et- 
Loire ; Fontevrault, Marne-et-Loir. 
D. 4000. Fragment on slide. Senonian. St. Paterne. Purchased F. Gamble, 
1898. Identified by M. Pergens. 
BIVESTIS, Hamm, 1881 . 
[Bry. mask. Ob. -Sen. i., Cycl. p. 37.] 
Diagnosis. 
Zonatulidse with a zoarium of erect, branched stems, which 
consist of zooecia arranged in two different layers ; one series 
forms a vertical sugar-loaf-shaped group, which is surrounded, 
like a mantle, by a layer composed of other zooecia. 
The zooecia are dimorphic, and the two types are arranged in 
irregular groups. Apertures irregularly arranged, and the 
separate apertures are flush with the surface. 
Type Species. 
Bivestis macropora, Hamm. Senonian — Haastrichtian : Ciply. 
