284 HISTORY OF BRITISH ZOOPHYTES. 



its numerous tufts, which are smaller and of a duller white 

 than those of C. eburnea. 



Genus VIT. CBISIDIA, M. Edwards. 

 Gen. Char. Cells linked in a single series ; the upper portion 

 free and divergent. Jolin&ton. 



1. CRISIDIA CORNUTA, Goafs-horn Coralline. (Plate XV. 

 fig. 51.) 



Hab. On other corallines and on seaweeds beyond low- 

 water mark. 



Ellis, who gives a good figure of it, says, " This very 

 small capillary coralline consists of branches of single cells, 

 shaped like goats' horns inverted, placed one above another, 

 on the top of which is a small circular opening, which in- 

 clines inwards. At the back of this rises a fine upright 

 hair, near the insertion of the next cell above it." It has 

 oval-shaped vesicles, which are specked. The long bristles 

 are sometimes jointed ; but we have not observed them so in 

 the West, where it is often found, especially on Delesseria 

 sanguinea. 



2. CRISIA SETACEA, R. Q. Couch. 



Hab. Shores of Devon and Cornwall, Couch ; Salcombe, 

 Rev. T. Hincks. 



