vertically placed among the filaments of superficial warts (nemathecia) of an 

 oblong or linear form. The colour is a rich, deep blood-red, becoming 

 darker in drying. The substance is thick, leathery when recent, rigid and 

 somewhat horny when dry, and the frond scarcely adheres to paper in 

 drying. 



The first specimens I saw of this fine Alga were sent me by 

 Dr. Curdie, of Geelong, together with a considerable collection 

 of Algae made by him near the mouth of the Glenelg, in South 

 Australia ; and in inscribing the genus with his name I but pay 

 a tribute of respect to an early explorer of the Australian shore. 

 I had selected, and distributed to some correspondents, another 

 Curdiea, from the same collection, but was obliged to cancel the 

 name, having afterwards ascertained it to be Acrotylus, J. Ag. 

 The genus now established will rank near Gracilaria, from which 

 it differs specially in the tetrasporic fruit, and near Sarcodia, 

 from which it differs in structure. It appears to extend along 

 the whole coast of Victoria, and is not very rare, though among 

 the rarer Algae. Its large dark-red marginal coccidia are very 

 characteristic, but scarcely two specimens are to be found with 

 similar branching. The figure given represents portion of a 

 much larger frond. 



Fig. 1. Cukdiea laciniata ; portion of a frond, with marginal coccidia. 

 2. A fragment, with nemathecia : — both of the natural size. 3. Section of 

 the frond and of a nemathecium. 4. A tetraspore and paranemata. 5. Sec- 

 tion of a coccidium : — all magnified. 



