BOTANICAL SOCIETY OF EDINBURGH. 563 



among the above-mentioned material irom the Berlin 

 Herbarium, showed cystocarps quite similar in shape 

 and mode of development to those of E. cervicornis. 

 Although, here also, the procarps originated from the lower 

 cells of the wall-forming filaments, they were not embedded 

 in the internal cavity of the shoot, but in the tissue of 

 the wall itself, the mucilage of which enclosed them. In 

 the same way the gonimoblasts also, which developed 

 from the fertilised procarps, were embedded in the projec- 

 tion formed at this point by the wall of the thallus. The 

 ripe cystocarps of this species form small almost hemi- 

 spherical elevations, which project distinctly from the 

 outer surface of the fertile branches of the thallus.^ 



From these observations I have now, for the first time, 

 proved that the genus EndotricMa can no longer be main- 

 tained. Neither the structure of the thallus, nor the 

 form or mode of development of the cystocarps " present 

 any decided points of difference from Gloiopeltis. I 

 formerly united Endotricliia, Sur., with Gloiopcltis, J. Ag.,in 

 my list of the Genera of Floridea? ^, and have now pro- 

 ceeded to designate E. cervicornis, Sur., by the older 

 synonym Gloiopeltis cervicornis, Sur. 



The results obtained by these observations, however, lead 

 up to the question, how are the cystocarps developed, and what 

 is their form in the other two species of GloioiKltis, namely, 

 in the typical species G. tenax ? I therefore made it my 

 object to search wherever I could for the species of Gloioj^cltis. 



By the help of the various European Herbaria, which I 

 was enabled to examine, but also especially by the willing 

 assistance of the monographer of the genus Gloiopcltis, 

 Prof. Suringar, of Leiden (to whom I must here once more 

 express my best thanks), I was able finally to collect a 

 quantity of material for observation, and by its means to 

 solve at least in part the above problems. 



^Comp. Suringar Alg. Japon., Tab. 18, and illustr. pi. ii. figs. 3, 6, 

 9, 13, 17, 24, 28, 83. 



-The circumstance that in 7i. cervicornis the ripe gonimoblasts are 

 immersed in the inner cavitj' of the shoot, while in G". capillaris they 

 are, on the other hand, embedded in the locally thickened and out- 

 wardly projecting mass of the thallus wall, is in no way sufficient to 

 caiise the separation into two distinct genera of species otherwise 

 quite similar in structure. 



3 Flora, 1889. 



