20 Mr. JAMES SowERBY's Account, &c. 
It may not be amiís to obferve here, that, in addition to the 
various forms in this genus, we are generally captivated with the 
beautiful difplay of their colours. In the quadrangularis, we cannot 
but admire the principal rays, from. the colour being fo regularly 
difpofed in rings round them*, which is more diftinét in the alatas 
making it vie with the former in beauty; in the /aurifolia it is fimi- 
lar; it adds much alfo to the beauty of the cærulea. The fmaller 
ones in general have yellow rays. The different parts are commonly 
fpotted, or otherwife coloured; in moft of them. 
* 'Thefe rings are red towards the bottom of the rays, alternately relieved with white, 
upwards becoming purple, terminating in a rich ultramarine or fmalt blue towards their 
tops ;: this blue is the more like fmalt, being partly powder, which if dufted on white 
paper we might miftake for fuch, 
VI. Defirip- 
