218 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genotype. — Bugulopsis (Cellularia) peachi Busk, 1851. Recent. 



Waters, 1913, and Harmer, 1923, range in a single genus the species 

 of Tricellaria and Bugulopsis. As we believe both of them are arti- 

 ficial, we prefer to separate them in order to give more cohesion to 

 the diagnoses. A diagnosis containing exceptions is no longer a 



Fig. 78. — Genus Notoplites Harmer, 1923 

 A--G. Notoplites (Serupocellaria) avicvlariae Yanagi and Okado, 1918. A. 

 Zoarium natural size. B. Portion of a branch in frontal view, showing ovicell, 

 frontal avicularia, and operculum, X48. C. Dorsal view of the bifurcating parts 

 of a branch, to show the position of vibracula and the origin of rootlets, X32. 

 D. Mandible of frontal avicularium, X 150. E. Mandible of lateral avicularium, 

 X150. F. Mandible of dorsal avicularium (basal of Harmer) X150. G. Dorsal 

 avicularium chamber, X120. (A-G, after Yanagi and Okado, 1918.) 



H. Notoplites rostratus Harmer, 1923. Diagram of bifurcation of the colony. 

 A rootlet occurs on the distal segment of K. (After Harmer, 1923.) 



diagnosis. The characters of a genus ought to be positive and never 



negative. 



Genus JUBELLA Jullien, 1882 



The zoarium is articulated. The segments are quadriserial on the 

 convex face and biserial on the dorsal face because of the covering 

 of the axial zooecia. There are no heterozooecia. 



Genotype. — Jubella enucleata Jullien, 1882. Recent. 



Genus RHABDOZOUM Hincks, 1882 



The segments are cylindrical and attached to the extremity of long 

 fibrous pedicells radiating from a principal trunk. The opesium is 

 very small. The radicular dietella is proximal. Some marginal 

 zooecia are ornamented at the front of the opesium with two long 

 hollow spines. 



Genotype. — Rhabdozoum wilsoni Hincks, 1882. Recent (Australia). 



