206 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



1891. Onuchocella angulosa WATERS, North Italian Bryozoa, Quarterly Journal of the 



Geological Society, vol. 47, p. 9. (not synonymy). 

 1895. Onychocella angulosa NEVIANI, Bryozoi fossili Farnesina, Paleontographica Italica, 



vol. 1, p. 97, pi. 5, fig. 7. 



1904. Onychocella angulosa CANU, Bryozoaires Tertiaires Tunisie, Explorations Scientiflques 



de la Tunisie, p. IS, pi. 34, fig. 2. 



1907. Onychocella angulosa CANU, Bryozoaires des Terrains tertiaires des environs de Paris, 

 Annales de Paleontologie, vol. 2, p. 21, pi. 3, fig. 11. 



1905. Onychocella angulosa CANU, P.ryozoaires fossiles des Terrains du Sud-Ouest de la 



France, Bulletin Societe geologique de France, ser. 4, vol. 6, p. 513, pi. 12, fig. 13. 

 1909. Onychocella angulosa NORMAN, The Polyzoa of Madeira, Journal Linnean Society 



Zoology, vol. 30, p. 293, pi. 37, fig. 1. 

 1912. Onychocella angulosa CANU, Bryozoaires helvetiens de 1'Egypte, Memoires de 1'Insti- 



tut egyptien, vol. G, p. 201, pi. 10, fig. 10. 



(A0=0.16-0.20mm. 



,, . fA0=0.16-0.20mm. 



Measurements. Opesia < , . , ,, , ,, , 



[lo= 0.18-0.20 mm. (Max. 0.26.) 



. f Lz= 0.40-0.60 mm. 

 Zooecia . n * n n r, n 



lfe=0.40-0.60mm. 



Opesium of the |A<m=0.20mm. r> . i 11 fZ0=0.60min. 

 onychocellarium J lon=0.10 mm. n { lon= 0.28-0. 30 mm. 



Affinities and variations. The zooecia are hexagonal, but of an irregularity 

 which defies all constant micrometric measurements. The polypedian convexity 

 is hardly apparent and the opesiular indentations are not symmetrical. The opesium 

 is sometimes transverse, but more often somewhat elongated. 



The opesium of the onychocellarium often has a small proximal sinus, larger 

 in the interior than on the exterior as in the recent specimens. 



The presence of this species off the Madeira Islands and in the Priabonian of 

 Europe rendered it probable that it would be found in America. However, it is 

 rare in the latter country. 



Occurrence. Middle Jacksonian: Wilmington, North Carolina (rare); near 

 Lenuds Ferry, South Carolina (rare). 



Geological distribution. In France, this species makes its appearance in the 

 Lutetian of the Paris Basin and the Pyreneean Basin (Canu). It exists abundantly 

 in all the younger stages which border the Mediterranean in France, Italy, Algeria, 

 Tunis, and Egypt. 



Habitat. Mediterranean (to a depth of 80 meters). Atlantic : Madeira Islands 

 (50-70 fathoms). Pacific: Off China. The species seems to be an inhabitant of 

 the warm seas. 



PJcswtypes.Q-At. No. 63964, U.S.N.M. 



ONYCHOCELLA GEORGIANA, new species. 



Plate 17, figs. 15, 16. 



Description. The zoarium incrusts rocks. The zooecia are hexagonal, elon- 

 gated, distinct, but confluent among themselves. The cryptocyst is finely granular, 

 concave, smaller than the opesium; the opesium is elliptical or oval with a convex 



