BOTRYLLUS SMARAGDUS. 



07 



found by Dr. Borlase in Mount's Bay, Cornwall, and 

 described and figured by him in 1758. Usually quoted 

 as equivalent to the species which he figured with it 

 (Botryllus SV//./(>,s\svr/), so early as 1820 Fleming recog- 

 nized it as distinct and named it LMnjlliis Borlasii. 

 The authors of the present monograph placed it under 

 P>. bivittatus, a species from which it differs entirely in 

 colour. 



Borlase, after describing Botryllus NrA/nx.xrn, says: 

 " Somewhat different from this, though of the same 

 tribe, was an alcyonium which I found on a ledge 



III 



D 



! '. '/ 



FIG. 125. Borlase's two species of BotryllHs referred by him to 

 Alcyonium. Natural size and magnified, a, B. Schlosseii. b, ? B. 

 smaragdus. (After Borlase, loc. cit.) 



called Careg-killas, in Mount's Bay, where, as I was 

 tumbling over the moveable rocks, I found one coated 

 with a transparent, callous substance, spread on some 

 rocks about six inches, in one near two feet square at 

 a medium : the coating was about one sixth of an inch 

 thick ; the ground was dark green ; the flowers con- 

 sisted of ten obtuse petals, which were of a vivid 

 yellow green ; each petal was in two places pierced of 

 the field (as the heralds term it) ; that is, had two 

 specks in each (in this differing from the foregoing) 

 which transmitted the colour of tliejield; the flowers 

 and ground together make so pretty a piece of tapestry, 

 that one might be surprised to find such colouring and 



