CABEREA BORYI. 63 



cases it takes the regular course, and assumes the ordinary 

 form, being pretty equally developed above and below. In 

 the size of the tufts the Australian and British forms agree. 



Habitat. On Eschara and other Polyzoa, Nullipores, 

 Algse, &c., from between tide-marks to moderately deep 

 water (Coralline ground). 



Localities. Torquay (Hooker) : on Eschara foliacea 

 and Scrupocellaria scruposa, off Budleigh-Salterton (Miss 

 Cutler and T. H.) : Goran Haven, Cornwall (C. W. P.) : 

 Pllfracombe (A. Leipner)*: Guernsey, common (R. S. 

 Cooper and A. M. N.) : Herm, tidemarks, under stones 

 (T. H.) : Jersey (A. M. N.) ; Hastings, rare (Miss Jelly). 



Geographical Distribution. Egypt (Savigny) : Adria- 

 tic, on Nullipores (Heller) : New Zealand (Hooker and 

 F. W. Hutton) : Glenelg, Australia (T. H.) : Cumberland 

 Island (Busk) : E. Falkland Islands; S, Patagonia, 49° 

 S.J Port St. Julian, Patagonia; Strait of Magellan (Dar- 

 win) : Algoa Bay (Busk) : Singapore (Liverpool Free 

 Museum, teste T. H.) : Roscoff, common (Joliet). 



The vibracular cells of this species bear a close resem- 

 blance to those of C. Ellisii. The radical fibres originate 

 only on the lower portion of the zoarium, hardly extending 

 much beyond the base of the shoots ; and the dorsal sur- 

 face therefore wants the prominent subcarinate appear- 

 ance which it exhibits in the latter species. 



Both in this and the preceding species the older por- 

 tions of the zoarium become coarse and much thickened ; 

 and in this condition it is very difficult to determine the 

 minute structure. 



C. Boryi does not occur in the extreme north, but 

 otherwise is remarkable for the extent of its geographical 

 range, 



* Mr. Leipuer has a fine specimen, which he has no doubt was obtained 

 either at Ilfracombe or Tenby — he believes, tlie former. 



