118 



BXJU-ETIN 125, UNITED STATES NATIONAL MUSEUM. 



Flustramorpha Busk, 1884, characterized by the presence of radicular fibers 

 and vibracula. 



The laiown species belonging to this genus and its subgenera are as follows : 



Microporella ciliata Linnaeus, 1759. 



Microporella flahelligera Levinsen, 1909. 



Microporella divaricata Waters, 1903. 



Microporella Jiyadesi JuUien, 1888. 



Microporella personata Busk, 1852. 



Microporella rudis McGilHvray, 1895. 



Microporella rugosa Maplestone, 1900. 



Microporella marginata Maplestone, 1909. 



Microporella coronata Audouin, 1896. 



Microporella (Flustramorpha) marginata Krauss, 1837. 



Microporella (Diporvla) verrucosa Peach, 1868. 



Microporella {Diporvla) hastigera Busk, 1884. 



Microporella (Ellipsopora) fiaheUaris Busk, 1852. 



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. Ovicellcd 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 Le%'in8en, 1909.) H. Zooecia from the basal surface, X 26, showing the dietellae. (After Levin- 

 sen, 1894.) I.J, Opercula and nmndibles. (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 ) 

 U.Mi^oporella divaricata Ca.nu, 1902. (After Waters, 1903.) N, O. Microporella personataBvek, 1852. 

 (After Busk, 1885.) P, Q. Microporella coronata Audouin, 1826. (After Waters, 1909.) 



