116 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
1908. Microporella malusi Robertson, The incrusting cheilostomatous Bryozoa of the west coast 
of North America, University of California Publications, Zoology", vol. 4, no. 5, p. 282, 
pi. 18, figs. 35, 36. 
1909. Fenestrulina malusi Norman, The Polyzoa of Madeira, Journal Linnean Society, Zoology, 
vol. 30, p. 297. 
1910. Microporella malusi Waters, Reports on the marine biology 7 of the Sudanese Red Sea, Journal 
Linnean Society of London, Zoology, vol. 32, p. 168. 
1912. Microporella malusi Barroso, Briozoos de la estacion maritima de Santander, Trabajos del 
Museo de ciencias naturales, no. 5, p. 27. 
It is remarkable that this very cosmopolitan species has never been observed 
in the western Atlantic, fossil as well as recent. 
Jia = 0.08-0.10mm. „ . [ Lz = 0.50 mm. 
Measurements. —Apertura! T" Zooecia , . 
r [la = 0.16-0.18 mm. lfe = 0.36mm. 
Occurrence. —Pleistocene: Santa Barbara (common), and Dead Mans Island, 
off San Pedro, California (very rare). 
Fig. 19. —Genus Fenestrulina Jullien, 1888. 
A-J. Fenestrulina malusi Savigny Audouin, 1826. A. A zooecium X 50 showing all the characters. 
B, C. Stellate frontal pores, X 250. (A-C, after Waters, 1903.) D. Portion of surface of a zooecium, 
X 175. E. Aperture, X 100. (After Levinsen, 1909.) F. Detailed structure of the ascopore (fenes- 
trule of Jullien) X 175. G. Dorsal face of the zooecia, showing the dietellae X 18. H. Zooecia X 21, 
several showing the ovicell. (D, F-H, after Levinsen, 1894.) I. Ancestrula and ancestrular zooecia, 
X 25. J. Ancestrula. The frontal membrane is typically Flustrine, its calcareous margin bearing 
ten spines, of which three are oral spines; op, operculum; 6. b., brown body; f. m., frontal membrane 
(=ectocyst). (After Harmer, 1902.) 
K. Operculum, X 85. (After Waters, 1877.) L. Fenestrulina parvipora Waters, 1903. Oper¬ 
culum, X 85. M. Fenestrulina proximo. Waters, 1903. Operculum, X 85. (I, L, M, after Waters, 
1903 
