dilate from the approximation of piiiiue on a short rachis. Segments in 

 every part linear, 3-4 lines wide, rounded at the extremity, concave or 

 channelled, with inflexed edges, but not with involute apices, each traversed. 

 by a very slender midrib. Under a pocket-lens the frond appears elegantly 

 netted by the crossing of longitudinal and transverse, closely-placed lines, 

 which divide the surface into minute, oblong, rectangular spaces ; these 

 lines are the boundary walls of internal cavities, which form a stratum of 

 honeycomb cells in the centre of the membrane, and they cease to be visible 

 when the surface is examined with a microscope. No ceramidla have yet 

 been observed. Stichidia are very commonly formed ; they are linear or 

 lanceolate, solitary or clustered, and always placed in transverse lines con- 

 necting the margin with the midrib. Colour a dark brown-red, becoming 

 blackish in the herbarium. The substance is tough and rigid, but semi-trans- 

 lucent ; and the frond does not adhere to paper in drying. 



It is hoped that the present figure and description will better 

 illustrate this fine plant than those given in ' Nereis Australis,' 

 and which were prepared from the very imperfect specimens then 

 known to me. Some of the larger specimens I now possess 

 would require a folio of large size to do them justice. These 

 were cast up from deep water. When growing at the edge of 

 low water, as at Middleton Bay, King George's Sound, the frond 

 is much more dwarf and bushy, rarely reaching a foot in height, 

 and is very generally deformed by parasitic growths of Corallines, 

 etc. The largest specimens I hqve seen were cast ashore near 

 the lighthouse, on Rottnest Island. 



My friend George Chfton and other collectors in AYestern Aus- 

 tralia will do well to look for the ceraniidia of this plant, which 

 are as yet unknown to botanists. Probably they resemble those 

 of a Lenormandia. 



Fig. 1. KUETZINGIA CAN.\LicuLATA, portion of an adult frond, — the natural 

 size. 2. Suiall portion of a pinnule, bearing 5/<c/«Vi«. 3. Cross section of 

 the frond. 4. A cluster oF stichidia, bearing ietraspores : — all viagnijied. 



