570 TRANSACTIONS AND PROCEEDINGS. 



carps, iu the family of the Gloiosiphonacete along with the 

 genera Gloiosijyhonia, Schimmehnannia, and Thuretella. 



The determination of the species of the genus Gloiopeltis 

 is a matter of great difficulty. J. Agardh has, in the 

 Epicrisis Floridearum, sought to employ the more or less 

 marked projection of the " cystocarps " as a means of dis- 

 tinguishing the species. But the utility of this character 

 is very much diminished by what I have said above. In 

 all the species the true cystocarps are either immersed or 

 project outwards to a very slight extent, only the paraspore 

 fruits stand out strongly towards the exterior, and the 

 amount of projection of these paraspore fruits is not always 

 the same in one and the same species. 



For the determination of the species it is much better to 

 employ the characters which Suringar turned to such good 

 account, namely, the formation of rhizoids, the course of 

 the wall-forming filaments, the more or less marked tubular 

 hollowing out of the shoot, with the straight or zigzag- 

 winding of the central axis which is dependent thereon. 



There is still much to be done towards the more certain 

 discrimination of the species. It remains for us to hope 

 that the algologists of Japan, where alone, on the spot and 

 in the area of its distribution, the genus GloiojJcliis can be 

 worked out with any prospect of success, will soon under- 

 take the task. 



Provisionally it appears to me that the following are to 

 be distinguished as independent species of Gloioiieltis : — 

 G. cervicornis, Sur. ; G. tenax (Turn.), J. Ag. ; G. furcata 

 (Post, et Eupr.), J. Ag. ; G. capillaris, Sur. ; and (perhaps ? ) 

 G. dura (Piupr.), J. Ag. 



Note. — Owing to the untimely death of Prof. Schmitz this paper has 

 not had the benefit of his revision in print. ^Ir.'George Murray, Keeper 

 of the Botanical Department of the British Museum, has kiudly read 

 through the proof. 



