26 PROCEEDINGS OP THE IST ATIONAL MUSEUM vol.72 



wall at their proximal part and firmly fixed with their basal wall to 

 the frontal membrane of the distal zooecium. The colonies are not 

 jointed. (Levinsen, 1909.) 



This genus dift'ers from Farciminaria Busk, 1852, in the presence 

 of a distal avicularium and in the square section of the branches. 



Genotype. — Levinsenella (Columnaria) horealis Levinsen, 1909. 



LEVINSENELLA BRASILIENSIS Busk, 1884 



Plate 1, Figure 3; text Figure 4 



1884. Farciminaria brasiliensis Busk, Polyzoa collected by Challenger. Sci- 

 entific Results Voyage Challenger, vol. 10, pt. 30, p. 50, pi. 31, fig. 2. 



Our specimens are very close to Busk's species and differ only in 

 the avicularia, in which the mandible is perpendicular and not par- 

 allel to the zooecial plane. They were living and 

 ovicelled January 27, 1884. 



The opercular valve is absolutely analogous to 

 that in the Flustridae and the Membraniporae. 

 FIG. 4.-LEVINSENELLA Occurrence.—J) . 2117, Caribbean Sea: 15° 24' 



BEASILIENSIS BUSK, ' ' . 



1884. opEKcuLAR 40"N.;63°31'30" W.;683fms.; 



VALVE AND APEE- yollow mud, fiuc saud. 



TUBA, X 85, BACH at- i tt, i • o 1 



BORDERED BY A Atlautic I North of Bahia, South 



^'^^^"^ America, 648 meters. 



Plesiotypes.— Cat. No. 7477, U.S.N.M. 



Genus NELLIA Busk, 1852 



NELLIA OCULATA Busk, 1852 



1873. Nellia oculata Smitt, Floridan Bryoaoa, pt. 2. Kongl. Svenska Veten- 



skaps-Akademiens Handlingar, vol. 11, No. 4, p. 3, pi. 11, figs. 53, 



54. 

 1914, Nellia oculata Osburn, The Bryozoa of the Tortugas Islands, Florida. 



Publication Carnegie Institution, Washington. No. 182, p. 191 



(American bibliography) . 

 1920. Nellia oculata Canu and Bassler, North American Early Tertiary 



Bryozoa. Bull. 106, U. S. National Museum, p. 196, pi. 82, figs. 



6-10. (Supplementary bibliography.) 



1922. Nellia oculata Marcus, Bryozoen von den Aru-Inseln. Abhandl. 



Senckenb. Naturf. Gesellschaft, vol. 35, p. 423. 



1923. Nellia oculata Canu and Bassler, North American Later Tertiary 



and Quaternary Bryozoa, Bull. 125, U. S. National Museum, p. 

 55, pi. 2, figs. 5-7. 



.^11 [^0 = 0.06-0,10 mm. 

 Measurements. — Opercular valvei, ^ ^^ r^-ir^ 



^ [/o = 0.08-0.10 mm. 



, (jL3 = 0.50-0.54 mm. 



Zooecia|^^^Q26mm. 



Diameter of branches, 0.30 mm. 



