APPENDIX. 241 
irritated. Although my specimens often assumed the 
form represented in fig. 3, Mr. Lloyd informs me that 
it must have arisen from unhealthiness of condition, 
its usual habit being to contract into a more flattened 
form. When fully expanded, its transparent and 
lengthened tentacles present a beautiful appearance. 
Fig. 3a, showing a basal disk, is given for the 
purpose already described. 
BALANOPHYLLAZA REGIA. PI, V. fig. 1. 
Another species of British madrepore, found hy 
Mr. Gosse at Ilfracombe, and by Mr. Kingsley at 
Lundy Island.. It is smaller than C. Smithii, of a 
very bright colour, and always covers the upper 
part of its bony skeleton, in which the plates are 
differently arranged from those of the smaller species. 
Fig. 1 shows the tentacles expanded in an unusual 
degree; 1 a, animal contracted ; 10, the coral; 1c, 
a tentacle enlarged. 
R 
