SCHIZOPORELLA VULGARIS. 245 



I.i I'Ru.u INTERMEDIA, Reuss, Bryoz. d. osterr.-ungar. Miooans, 20, pi. viii. 

 fig. 11 (granular var.). 



MuLLIA VULQARIS, foriUU TYPICA, Smitt, I. C. 14. 



Zocecia oval or rhomboid, convex, distinct, smooth or 

 subgranular ; orifice well arched above, the inferior 

 margin straight, with a notch in the middle, occasion- 

 ally a central mucro a little below it ; oral spines four or 

 five ; an avicularium on each side, about halfway down 

 the cell, or, in some cases, nearer to the top, with a long 

 and slender vibraculoid mandible. Ooecia small, sub- 

 globose, smooth, united to the cell above, sometimes 

 umbonate. 



RANGE OF VARIATION. I have noticed the smallest amount 

 of variability in British examples of this species. The 

 cells are more or less granular, a difference of no signi- 

 ficance whatever, and disposed sometimes irregularly* 

 sometimes in lines. 



In a beautiful Mediterranean specimen, for which I am 

 indebted to Mr. Waters, there is a mucro on the front of the 

 cells, which sometimes attains a considerable length, and a 

 prominent umbo on the ooecium (Plate XV. figs. 5, 6). 



On the whole, there are few species more constant in 

 character. 



HABITAT. On stones, shells, weeds, &c., from moderate 

 depths to deep water. 



LOCALITIES. South-west of Polperro, 30 fathoms (T. H.): 

 coast of Antrim, deep water (Hyndman) : Hastings (Miss 

 Jelly) : Birterbuy Bay (A. M. N.). 



GEOGRAPHICAL DISTRIBUTION. Mediterranean (Moll) : 

 Naples, on Sargassum (A. W. Waters) : Madeira (J. Y. J.). 



RANGE IN TIME. Vienna basin (Reuss): Austro-Hun- 

 garian Miocene deposits, granular var. (Reuss): Pliocene 

 deposits, Bruccoli, Sicily (A. W. Waters). 



The appendages in this species resemble in character 



