118 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



little convex. Sometimes there is a small interzooecial fusiform 

 avicularium ( ? ) . 



~ ". f/w>=0.60-0.70mm 



Measurements. — Upesmm { . A OA „ . K 



r Uo= 0.30-0.45 mm 



fZs=0.75-0.95mm 



Zocecium \ n -n n ta ™ 

 [ Is = 0. oO-O. i mm 



The great irregularity of form and zooecial dimensions of this 

 species justifies its name. There are some variations which recall 

 those of Membranipora irregularis Manzoni, 1875 1 which possesses 

 a mural rim enlarged at the base and also some large interzooecial 

 avicularia. 



The present species differs from the splendid Ogivalina eximipora 

 Canu and Bassler from the Middle Jacksonian of North and South 

 Carolina in its smailer dimensions, in the absence of cryptocyst, and 

 in the presence of a gymnocyst. The avicularium (?) is identical 

 in form and position. 



Occurrence. — Emperador limestone, old quarcy, one-third mile 

 north of west of Empire, Panama Canal Zone. D. F. MacDonald 

 and T. Wayland Vaughan, collectors, 1914, Station No. 6016. 



Southwest side Crocus Bay Hill, Anguilla, Leeward Islands. 

 T. Wayland Vaughan, collector, 1914, Loc. No. 6893. 



Holotype.— Cat. No. 65039, U.S.N.M. 



Family OPESIULIDAE Jullien. 



Genus CUPULARIA Lamouroux. 



CUPULARIA UMBELLATA Defrance, 1823. 



Plate 53, figs. '2-4. 



1908. Cupularia umbellata Canu, Iconographie des Bryozoaires fossiles 

 de l'Argentine, Anales del Museo Nacional de Buenos Aires, vol. 17, 

 p. 275, pi. 5, figs. 4, 5. (See for complete bibliography.) 



1909. Cupularia umbellata Canu, Bryozoaires fossiles du Sud-Ouest de 

 la France, Bulletin de la Socigte Ceologique de France ser. 4, vol. 9, 

 pp. 448, 454, pi. 16, figs. 16, 17. (Regional bibliography.) 



1909. Cupularia lowei Norman, On the Polyzoa of Madeira, Journ. Lin- 

 nean Soc, vol. 30, p. 290, pi. 37, figs. 7-12. 



1913. Cupularia umbellata Canu, Etude comparee des Bryozoaires Hel- 

 vetiens de l'Egypte avec les Bryozoaires vivants de la Mediterranee 

 et de la Mer Rouge, Mem. a l'institut Egyptien, vol. 6, fasc. 3, p. 205. 



1913. Cupularia umbellata Canu, Cont. a l'etude des Bryozoaires fossiles, 

 pt. 5, p. 125; pt. 7, p. 126; pt. 12, p. 127; Bulletin Soc. Geol. France 

 (IV, XIII). 



1914. Cupularia lowei Osbuen, The Bryozoa of the. To rtugas. Islands, 

 Florida. Publication No. 182, of the Carnegie Institution of Washing- 

 ton, p. 194. 



1 Briozoi del pliocene antico di Castroearo, Bologna, 1875, p. 10, pi. 1, figs. 5, 8. 



. . . 



