NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
503 
Fig. 141. — Genus Retepora Imperato, 1599. 
A, B, C. Retepora cellulosa (Linnaeus) Smitt, 1867. A. Several zooeeia. X 25. B. Avicu- 
larium. C. Operculum and mandible, X 85. (A-C after Waters, 1894, 1900.) 
D. Retepora (Sertella) gracilis Jullien, 1903. Zooecium, X 115. 
E. Retepora (Sertella) acquitanica Jullien, 1903. Several zooeeia, X 70. 
F. Retepora ( Sertella ) oceanica Jullien, 1903. Portion of a branch, X 70. (D-F after 
Jullien, 1903.) 
G. Retepora mediterranea Smitt, 1867. Oral aperture and operculum, X 85. (After Waters, 
1894.) 
H. Retepora complanata Waters, 1894. Operculum, X S5, and mandible, X 250. (After 
Waters, 1894.) 
I. Retepora ( Sertella ) beaniana King, 1S46. Zooecial orifice and reteporidan avicularium, 
X S5. (After Jullien, 1903, and Waters, 1894.) 
J. Retepora couchvi Hindis, 1880. Zooecial orifice and opercula, X 85 and 250. (After 
Jullien, 1903, and Waters, 187S, 1885.) 
K. Retepora abyssinica Waters, 1909. Zooecial orifice, operculum, and mandibles, X 85. 
(After Waters. 1909.) 
L. Retepora jermanensis Waters, 1909. Zooecial orifice, operculum, and mandibles, X 85. 
(After Waters, 1909.) 
M. Retepora (Sertella) tristis Jullien, 1909. Operculum, X ISO. (After Jullien, 1903 ) 
N. Retepora porcellana MacGillivray. 1868. Operculum, X 85. (After MacGillivray, 1885.) 
O. Retepora fissa MacGillivray, 1S68. Operculum, X 85. (After MacGillivray, 1885.) 
P. Retepora grimaldi Jullien, 1903. Zooecial orifice. (After Jullien, 1903.) 
Q. Retepora producta Busk, 1884. Opercula and mandibles. (After Busk, 1884.) 
R. Retepora atlantica Busk, 1884. Opercula and mandibles. (After Busk, 18S4.) 
S. Retepora jacJcsoniensis Busk, 1884. Opercula and mandibles. (After Busk, 1884.) 
