186 T. H. BUFFHAM ON SOME FLORIDE.E. 



ductive body is ellipsoidal, 40-45 /x long, and 25-28 p. diam. The 

 cells of the axis destined to be changed begin by dividing 

 longitudinally into four (generally three only of these are 

 visible), and from these segments gelatinous extensions are 

 made in which the pollinoids, which are about 2 /x in diam., are 

 produced. The antheridium has a rather delicate and unde- 

 fined outline outside the 6-8 transverse rows of cells (Fig. 13). 

 (Torpoint, Sept., 1895.) 



In Ceramium acanthnotum Carm. the antheridia form small 

 cushion-like projections round the nodes of the upper parts of 

 the filaments. They have the character usual in this genus (in 

 which I have recorded most of the British species, and figured 

 several), and were seen in French specimens long ago by Thuret. 

 (Paignton, Aug., 1894.) 



Microcladia glandulosa Grev. is one of our rarest species, and 

 even when found is too frequently barren. After a gale a con- 

 siderable number of specimens were thrown up and amongst 

 them some bearing male organs. These, without the micro- 

 scope, are not distinguishable from quite barren specimens. 

 Owing to the density of the thallus they are easily overlooked 

 even with it. They form irregular patches on the uppermost 

 portions of the frond, and are usually more developed on the 

 inner edges of the dichotomous frond, where they project a little 

 (Fig. 14). They are in character very similar to those of 

 Ceramium, as might have been anticipated from the relations of 

 the two genera. The "pile" is, of course, seen better in a 

 transverse section of a division of the frond (Fig. 15). Where 

 such a section falls near the irregular boundary of a patch it 

 may be seen that a cell of the cortex buds into smaller ones 

 which emit the long cells (about 20 //,) which produce pollinoids 

 about 3 fi in diam. There is no general gelatinous investment 

 of the bodies, but these are free (Fig. 16). (Paignton, Aug., 

 1894.) 



The early stages of the female organs will afford much interest 

 to the student, and in some cases may tax his skill in dissec- 

 tion. Only the most cursory notes on some observed since the 

 previous paper (loc. cit.) can be given here. When the pro- 

 carps with trichogynes are observed the succeeding stages 

 should be sought out and the development followed to the 

 mature cystocarps. In most of the instances here given the 



