T. H. BUFFHAM ON REPRODUCTIVE ORGANS OF THE FLORIDE^. 261 



gate, March, 1885, there was one of Fastigiaria furcellata Stack- 

 house (Furcellaria fastigiata Lamour) which had the " ovate, 

 pale-coloured, pod-like bodies " which puzzled Harvey. These 

 form the apices, about 8 mm. long, of the plant, and are antheridia. 

 The whole of the surface is covered by small yellowish cells, and a 

 transverse section of the " pod " shows them to be slightly 

 elongated vertically to the axis of the filament. 



In Chylocladia articulata Grev. the antheridia form a layer 

 covering one or two of the upper internodes of a filament, almost 

 white, the surface showing only minute pale dots without arrange- 

 ment. At the edge of the filament, however, the cells are seen 

 to be much more elongated than in the preceding species, and very 

 much smaller. (Sidmouth, Aug., 1886.) 



I picked up at Ramsgate (in June of the same year) a delicate- 

 looking specimen of Delesseria Hypoglossum Lamour. The 

 frondlets were much narrower than in the type of this very 

 variable species. I noticed that in place of the sori of tetraspores 

 there were two narrow white lines (PI. XXI, fig. 7) which the 

 microscope soon showed were antheridia. They lie along either 

 side of the midrib and on both surfaces of the frondlet, and the 

 edges have very irregular boundaries like coast-lines on a map. 

 There is observable, however, a somewhat oblique linear arrange- 

 ment agreeing with the set of the ordinary coloured cells (fig. 8, 

 X 25), and frequently they occur in spots and patches. On 

 examination with a power of 400 the separate cells are distinctly 

 seen to form a projecting surface, and on focussing down to an 

 edge of a promontory the cells are found to be elongated, each con- 

 taining, as usual, the antherozoid near its extremity (fig. 9). 



Catenella Opuntia Grev., at all times curious-looking, was found 

 (Sidmouth, Aug., 1886) having a most bizarre appearance. Inter- 

 mixed with cystocarps of all ages were pale bodies, single or in 

 irregular groups. Roughly spherical they are readily distinguish- 

 able from young cystocarps, which have a wide hyaline border, by 

 their wrinkled and somewhat withered aspect, and a faint appear, 

 ance of numerous lobes (fig. 10, x25). With a power of 100 

 the surface is seen to be covered with a large number of groups of 

 minute colourless dots (fig. 11). It is remarkable that such an 

 experienced collector as Mr. E. M. Holmes, F.L.S., F.R.M.S., has 

 not met with the cystocarps of this species, and the learned French 

 algologist, Dr. Ed. Bornet, wrote me saying : " Je connais depuis 



