Details of Ccelenterata. 67 



Heterochromia. 

 a. Ocracea, I peristome ochre yellow, zone black, tentacles grey, 



(type) J 



with blue and white spots. 

 /3. Pallida, peristome whitish grey unhanded, tentacles with 



white spots, 

 y. Viridescens, peristome greenish white unhanded, tentacles 



with white spots and rosy shades. 

 S. Aurata, column at base golden, peristome intenser yellow 



with crimson flush, tentacles grey with ochreous and white 



spots. 

 £. Carnea, column at base flesh coloured, peristome rosy, tentacles 



rosy, with white spots. 



Homochroma. 



K> Rosea, like e, but with rosy tubercles. 



»?. Nigricans, peristome blackish, with blue and green reflexions 



(riflessi). 



A few other examples may be given, all of which can be studied 

 in Dr. Andre's magnificently coloured plates. 



Aiptasia mutabilis is yellow brown, the tentacles spotted in 

 longitudinal rows, the spots growing smaller towards the tip, thus 

 affording a perfect example of the adaptation of colour to structure. 



Anemonia sulcata has normally long light yellow pendulous 

 tentacles tipped with rose, but a variety has the column still yellow 

 but the tentacles pale green, tipped with rose. 



Bunodes rigidus has the column green, with rows of crimson 

 tubercles, the tentacles are flesh-coloured, except the outer row 

 which are pearly ; the peristome is green, with brown lips. 



