NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
629 
Genotype. — Orbitulipora haidingeri Stoliczka, 1861. 
Range. — Auversian — Tortonian. 
Orbitulipora petiolus Lonsdale, 1850, Orbitulipora lenticular is Reuss. 1867, and 
Orbitulipora excentrica Se- 
guenza, 1880, are the only 
known species in addition to 
the genotype. 
Genus BATOPORA Reuss, 1867. 
1867. Batopora Reuss, Ueber 
einige Bryozoen aus 
deni deutschen Un- 
teroligocan S i t - 
zungsberichte der 
k. Akadeinie der 
Wissenscb a f t e n , 
Wien. Abth. 1 , p. 16. 
The apertura is orbicular. 
C B 
Fig. 191.— Genus Diplotaxis Reuss, 1867. 
A-E. Diplotaxis placentula Reuss, 1867. Various views of the 
(After Reuss, 1867.) 
zoarium magnified. 
A Be 
Fig. 190. — Genus Batopora Reuss, 1867. 
A-C. Batopora rosula Reuss, 1867. Frontal, dorsal, and lateral 
views of a zoarium, magnified. (After Reuss, 1867.) 
The frontal is a granular olocyst. The zoarium is 
conical, never hollow. The 
ancestrular zooecium is 
ornamented Avith radicu- 
lar pores. 
Geno typ e . — B atop o ra 
stoliczka! Reuss, 1867. 
Range. — Lutetian, 
Tortonian. 
The species of this 
genus are : 
Batopora stoliczkai 
Reuss, 1867. Latdorfian. 
B atop o ra scro b iculata 
Ivoschinsky, 1885. Lu- 
tetian. 
Batopora eonica Se- 
guenza, 1880. Tongrian. 
B at o p o r a conica 
Hantken (according to 
Pergens, 1887). Pria- 
bonian. 
Batopora multirad i- 
ata Reuss, 1869. Tortonian. 
Genus DIPLOTAXIS Reuss, 1867. 
1867. Diplotaxis Reuss, Ueber einige Bryozoen aus dem deutschen Unteroligocan, Sit- 
zungsberichte der k. Akadeinie der Wissenschaften, Wien, Abth. 1, p. 16. 
The zoarium is discoidal and formed of tAvo lamellae, hack to back. The 
zooecia of the external face are oriented toward the zoarial margins; the zooeeia 
of the inner face are oriented toward the center. The apertura has a distal rimule. 
Genotype. — Diplotaxis placentula Reuss, 1867. Latdorfian. 
