over both surfaces, prominent, roundish or oval, consisting at first of slender, 

 vertical filaments, which are chang(!(l finally into strings of cruciate tetra- 

 spores. Colour a bright, pinky-red, preserved in drying. Substance mem- 

 branous, rigid when dry. In drying it imperfectly adheres to paper. 



A strongly marked and not very variable Alga, and peculiarly 

 interesting on account of the wide geographical limits over which 

 it ranges. It was first noticed on the Atlantic coasts of the south 

 of Spain, next in California, and within recent years has been 

 brought from the various renioie and widely separated stations 

 above enumerated. The warmer temperate zones of the Atlantic 

 and Pacific, north and south, are its home. The most luxuriant 

 specimens seen, of the largest size and brightest colour, come 

 from New Zealand, where it seems to be of frequent occurrence. 

 In Australia it is comparatively rare. The locality Strangford 

 Lough, north of Ireland, now first recorded in print, was ascer- 

 tained by Professor Dickie, of Aberdeen (late of Belfast), who 

 found it growing on small, loose stones (its favourite habitat), in 

 one particular part of the harbour : this is the most northern of 

 the known stations, as New Zealand is the most southern. 



Fig. 1. Stenogramme interrupta, with linear conceptacles. 2. Fragment 

 with sori of tetraspores : — both the natural size. 3. A small portion of the 

 frond, with a sorus. 4. Section through frond and sorus. 5. Strings of 

 tetraspores. 6. Portion of frond and conceptacle, 7. Section through 

 frond and conceptacle : — variously magnified. 



