CLASS II.— ORDER HI. 



GENERA AND SPECIES. 



INARTICULATE POLYPIDOMS, 



UDOTEA. 



A FAN-FORMED, noii-articulated Polypidom; creta- 

 ceous, uninterrupted rind, marked with many curved 

 and concentric lines, which are parallel and trans- 

 versal. 



The colour of the individuals, which I have had 

 opportunities of observing, has inclined to white, like 

 the Halimedas when dry. I am induced to think this 

 colour would originally be green, as well as that of 

 many Corallinas. 



Their height varies from five to fifteen centime- 

 tres. 



The Udotcas originate from the equatorial seas 



