G. ACAMARCHIS. 57 



Hairs numerous, rather long, and bent towards the 

 branches. — Plate 2. fig. 5. a, B. C. 

 Australasia. 



CANDA. 



Frondescent, fan-shaped, and dichotomous Po- 

 lypidom. Branches united by small lateral and hori- 

 zontal fibres. Cells alternate, united, placed on only 

 one surface, and not projecting. 



Description can give but an imperfect idea of the 

 appearance of this Polypi dom, or of the effects pro- 

 duced by its dichotomous branches, united by side 

 and horizontal fibres, which connect all the parts of 

 this beautiful polypous production. 



It is probable that in their living state their colours 

 are very bright ; but desiccation has diminished some, 

 and destroyed many others. 



Their substance is membranous, horny, cretaceous, 

 and friable. 



Their height varies from three to four centimetres. 



Can DA arachno'ides, Plate 2. fig. 6. a. B. C. D. 

 On the rocks of Timor. 



ACAMARCHIS. 



Dichotomous Polypidom. Cells united and al- 

 ternate, terminated by one or two lateral points, with 

 a vesicle at their opening. 



The vesicles are nearly globular ; in form they re- 

 Cor. H 



