BOTANICAL SOCIETY OF EDINBURGH. OOO 



A short time before this revision of the genus Gloiopeltis 

 by J. Agardh another species of Ditmontia closely related 

 to D. /areata, and growing in Awatscha Bay, Kamtschatka, 

 had been described by Euprecht ^ as D. dura. In both 

 these species he found cystocarps and " tetraspores," and 

 indicates (p. 119) as a peculiar feature that " both forms 

 of fructification are met with near one another on tlie 

 same individual." He makes no mention of Agardh's 

 genus Gloiopeltis. 



Some years later Harvey " published a new species of 

 Gloiopeltis, G. coliformis, from the coast of Japan (Hakodadi 

 and Straits of Sangar). 



A detailed study of the Algte belonging to this genus 

 Gloiopeltis was subsequently carried out by Suringar.^ This 

 author obtained from the coast of Japan a complete series 

 of peculiar forms of Gloiopeltis, and has examined them in 

 the most painstaking manner, collecting the results of his 

 observations in a very careful and thorough Monograph, 

 in which not only has he described most accurately the 

 separate species occurring in Japan, but has also examined 

 in detail the anatomy of the thallus, and the finer 

 structure of the cystocarps. Moreover, he proposed a new- 

 distinct species G. cervicornis, Sur., as the type of the new- 

 genus Undotrichia. 



J. Agardh in his revision of the genus Gloiopeltis in 

 " Epicrisis Floridearum," follows closely this work of 

 Suringar ; he, however, defines certain species of the genus 

 in a manner somewhat different from that of that author, 

 and besides the species mentioned by him also includes 

 Dumontia dura, Eupr., in the genus Gloiopeltis under the 

 name of G. dura. 



Accordingly up to the present time two very closely 

 allied genera have been recognised, \\z. Gloiopeltis, J. A^., 

 and Eiidotricliia, Suringar. 



Both genera show a great similarity in the structure of 

 the thallus. From the cells of a septate central axis 



' Algje Ochoteuses, 1850, 118-119. 



- Character of New Algse, chiefly from Japan aud adjacent regions, in 

 Proc. Amer. Acad., iv. (1859), 332. 



^ Algaj Japouicae, 1870, p. 30 ; lUus. des especes du genre Gloio- 

 peltis, 1871-72. Compare also, Index priecursorius in Miq. Ann. Mus. 

 Bot. Lugd. Bat, iii. (1867), p. 259. 



