66 BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
Genus FORAMINELLA Levinsen, 1909. 
1909. Foraminella Levinsen, Morphological and Systematic Studies on the Cheilostomatous Bryo- 
zoa, p. 165. 
The somewhat arched frontal wall has no pores, but on each side a longitudinal 
series of (1-5) foramina (opesiules). A membranous opercular valve. Independent 
avicularia without crossbar, with an elongate mandible, on the one side furnished 
with a wing-like expansion. Hyperstomial ovicell with a membraneous ectooecium. 
Dietellae (Levinsen). 
Genotype.—Foraminella ( Monoporella ) lepida Hincks, 1881. Recent. 
Fig. 9—Genus Odontionella Canu and Bassler, 1917. 
A-E. Odontionella ( Membranipora ) Mans Hincks, 1885. 
A. Zooecia, X 75. (After Hincks, 1885.) B. Distal wall with septulae, X 25. C. Lateral wall 
with septulae, X 25. D. Operculum, X 85, showing chitinous ridge (er) and expansion (ea). E. Zooecia 
X 25. (B-E after Waters, 1898.) 
F, G, I. Odontionella occultata Waters, 1887. 
F. Specimen from recent seas with its avicularia. G. Example from the Tertiary rocks of New 
Zealand showing a thick calcareous deposit between the zooecia. I. Avicularian mandible, X 250. 
J, K. Opercula of another species (introduced by error.). 
H. Photograph of a specimen of Odontionella Mans Hincks from New Zealand showing the disym¬ 
metry of the opesiular indentations, X 20. 
