118 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
Flustramorpha Busk, 1884, characterized by the presence of radicular fibers 
and vibracula. 
The known species belonging to this genus and its subgenera are as follows: 
Microporella ciliata Linnaeus, 1759. • 
Microporella fiabelligera Levinsen, 1909. 
Microporella divaricata Waters, 1903. 
Microporella hyadesi Jullien, 1888. 
Microporella personata Busk, 1852. « 
Microporella rudis McGillivray, 1895. 
Microporella rugosa Maplestone, 1900. 
Microporella marginata Maplestone, 1909. 
Microporella coronata Audouin, 1896. 
Microporella ( Flustramorpha) marginata Krauss, 1837. 
Microporella ( Diporula) verrucosa Peach, 1868. 
Microporella ( Diporula) hastigera Busk, 1884. 
Microporella ( Ellipsopora ) flabellaris Busk, 1852. 
G 
Fig. 20.—Genus Microporella Hincks, 1877. 
A-I. Microporella ciliata Pallas, 1766. A. Zooecia with spines and mandible, X 43. B. Zooecia 
with avicularia, X 29. C. Ovicelled zooecia, X 40. E. Aperture, X 200. F. Ancestrula and ances- 
trular zooecia, X 29. (A-C, after Hincks, 1880.) G. The same part of the zoarium, X 55. (E, F, 
after Levinsen, 1909.) H. Zooecia from the basal surface, X 26, showing the dietellae. (After Levin- 
sen, 1894.) I. J, Opercula and mandibles. (After Waters, 1877, and Hincks, 1880.) 
D. Structure of the ascopore of Microporella hyadesi Jullien, 1888. 
K-Q. Opercula and mandibles. K, L. Microporella hyadesi Jullien, 1888. (After Waters, 1877.) 
M. Microporella divaricata Canu, 1902. (After Waters, 1903.) N, O. Microporella personata Busk, 1852. 
(After Busk, 1885.) P, Q. Microporella coronata Audouin, 1826. (After Waters, 1909.) 
