172 BULX.ETIN 125, UNITED STATES NATIONAL. MUSEUM. 



fAa = 0.10miu. rj . (i2 = 0.50inm. 



Variations. — There are sometimes on the peristome two very small avicularia 

 symmetrically placed. We have not observed the ovicell, but the distal interrup- 

 tion of the peristome is a sufficient reason for our generic assignment. 



This species differs from Lepralia tenera Reuss, 1867, in the presence of frontal 

 tremopores. 



Occurrence. — Miocene: Kuhns, Carteret Coimty, North Carolina (rare). 



Eolotype.— Cat. No. 68692, U.S.N.M. 



Genus MASTIGOPHOBA Hincks, 1880. 



(For description see Bulletin 106, U. S. National Museum, p. 586.) 



MASTIGOPHORA PESANSERIS Smitt, 1873. 



Plate 45, fig. 10. 



1873. flipportoa pesanseris Smitt, Floridan Bryozoa, pt. 2, Kongl. SvenskaVetenskapa-Akademiens 



HandUngar, vol. 11, No. 4, p. 43, pi. 7, figs. 159, 160. 

 1880. Mastigophora dutertrei, var. pesameris Kirkp.^trick, Polyzoa of Mauritius, Annals Magazine 



Natural History, ser. 6, vol. 1, p. 77. 

 1899. Schizoporella pesanseris W.\ters, Bryozoa from Maderia, Journal Royal Microscopical Society, 



p. 11, pi. 3, figs. 7, 8. 

 1905. Mastigophora dutertrei, var. pesanseris Thornely, Report on Polyzoa collected by Professor 



Herman at Ceylon in 1892, Ceylon Pearl Oyster Fisheries, Rept. Colonial Government, 



vol. 4, Suppl. Rep. No. 26, p." 117. 

 1909. Schizoporella pesanseris Waters, Marine Biology of Sudanese Red Sea, Journal Linnean 



Society London, vol. 31, p. 169. 

 1909. Escharina pesanseris Norman, Polyzoa of Maderia and neighboring islands. Journal Linnean 



Society London, vol. 30, p. 302, pi. 40, fig. 7. 

 1909. Escharina pesanseris Levinsek, Morphological and Systematic Studies on the Cheilostoma- 



tous Brj'ozoa, p. 326, pi. 18, fig. 1. 

 1914. Escharina pesanseris Osburn, Bryozoa of the Tortugaa Islands, Florida, Publication Carnegie 



Institution of Washngton, No. 182, p. 207. 



The generic position of this species is still doubtful. According to the oper- 

 culirni, Waters classified it in the S. cecili group {Arthropoma) ; according to the form 

 and position of the avicularia, Levinsen classified it in MastigopJiora (Escharina). 

 He believed that the ovicell is endozooecial. If this observation be verified it will 

 be necessary to create a new genus for this species. Our specimen is incrusting a 

 coral. 



Occurrence. — Pleistocene: Mount Hope, Panama Canal Zone (rare). 



Habitat. — Indian Ocean: Mauritius, Nanaar (55 meters), Siam^ Gulf of Suez 

 (Red Sea). Atlantic Ocean: Madeira (90 meters), Tortugas Islands (12-68 meters). 



Plesiotype.—C&t. No. 68693, U.S.N.M. 



MASTIGOPHORA GRANULOSA, new species. 



Plate 3, fig. 4. 



Description. — The zoarium incrusts shells. The zooecia are distinct, separated 

 by a deep furrow, large, elongated, and swollen; the frontal is very convex, orna- 

 mented with numerous small pores and minute granulations. The aperture is small. 



