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BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



The arguments given are really of little importance. Firsti^Cellaria 

 punctata not having been figured, Busk had a perfect right to give to 

 it a name more exact and significant. The abominable figure of 

 Cellaria gracilis Phillipi, 1843, did not at all represent a Cellaria, even 

 in the ideas of the time. Reuss, 1864 (p. 664), thinks that it is perhaps 

 a Myriozoum. The type having disappeared, the paleontologists 



Fig. 48. — Genus Catenicula O'Donoghue, 1924 



A, B. Catenicula corbulifera O'Donoghue, 1924. A. End of branch, X57, 

 bearing an ooecium which is somewhat flattened and the lateral plates opened 

 out. b, Body of zooecium; c, Chitinous annular joint; cp, central] almost 

 circular joint; db, dorsal, bladelike plate; e, enlarged zooecium with modified 

 triangular sac; o, semicircular opening of body; op, operculum; pi, posterior 

 lateral plate; sp, spines; t, triangular sac. B. End of a branch showing the 

 spine bearing zooecia, X57. (After O'Donoghue, 1924.) 



ABC 



Fig. 49. — Cellaria divaricata MacGillivray, 1895 

 Three transverse thin sections, X20, made through the same segment. 



have a long time ago erased Philippi's name from the nomenclature. 

 We maintain then the name of Busk. 



Affinities. — This species is very well characterized by the thinness 

 and gracility of the segments in which the length sometimes attains 1 

 centimeter, in its small micrometric dimensions, in the presence of a 



