62 CELLULARIID^. 



Canda Boryi, UOrh. Pal. Fran9. T. Cret. v. 331. 



Caberea Boryi, Buslc, B.M. Cat. i. 38, pi. xvi. figs. 4, 5 (as C. zelanica), 

 and pi. xxxviii. (as C. patagonica) : Hincks, Ann. N. H. for 

 Feb. 1855 (3 sep.) : Heller, Bryoz. d. Adriat. Meeres, 13: 

 Norman, Quart. Journ. Micr. Sc. (n. s.) viii. 217. 



Zoarium forming small flabellate tufts ; branches stout, 

 di^dded dicliotomously into a few segments. Zocecia in 

 two rows, or occasionally three, short, ovate, very slightly 

 produced and narrowed below; aperture oval, with a 

 flattened, rather broad border, expanded at the bottom ; 

 two or three spines on the outer side above, and one on 

 the inner, springing from the peduncle of the oper- 

 culum ; operculum expanded downwards, and filling in 

 the lower part of the aperture, occasionally giving off a 

 pointed process above; or more regularly developed and 

 suboval. Lateral avicularia very small ; mandible 

 rounded. Anterior avicularia raised, placed between the 

 cells down the median line, sometimes very large ; man- 

 dible rounded. Vibracula broad and flat below, slender 

 and tapering above, serrate. Ocecia arcuate, smooth, 

 inclined inwards. 



Height about | inch. 



Range of Variation. On Australian specimens I have 

 met with three spines on the outer side of the cells, 

 instead of the two which characterize such British exam- 

 ples as I have examined. The Australian form, too, is 

 distinguished by the very large size attained by the cen- 

 tral avicularia. They are raised, swollen, well rounded 

 above, and have the mandible on the front, perpendicular 

 to the surface of the zoarium. They form a line down 

 the centre of the branch. In British specimens they are 

 much smaller. The lateral avicularia arc extremely in- 

 conspicuous. The operculum exhibits some curious dif- 

 ferences in the mode of its development. Sometimes it 

 expands altogether doivnwarcls, filling in the lower part of 

 the aperture, and appearing as if soldered to the margin. 

 Occasionally a short spur is given off above. In other 



