114 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



Fa/77. 3. Gelidiaceæ. 

 Gelidium Lamour. 



1. Gelidium corncum (Huds.) Lamour. 



Lamouroux, J., Essai . . . Thalassiophytes (Annales du Museum, vol. 

 XX, 1813, p. 128). Bornet, E., Les Algues de P. K. A. Schousboe, 1892, 

 p. 270. 



Fucus corneus Huds., Fl. Anglica, 1778, p. 585; Turner, Fuci, vol. IV, 

 1819, p. 146. 



var. pinnata (Huds.) Turner. 



Turner, 1. c, p. 146, tab. 257, fig. d. 



Fucus p inn atiis Huds., Fl. Anglica, tome II, 1778. p. 586. 



Gelidium cærulescens Crouan in Maze et Schramm, Algues de Guade- 

 loupe, 1870—79, p. 109. Collins, F., The Algæ of Jamaica, p. 252. Non 

 Gelidium cærulescens Kiitz., Tab. Phycol. vol. 18, p. 19, tab. 56. 



The plant (Fig. 124) I here refer to this species seems to 

 agree fairly well with the above quoted figure of Turner. It is 

 the same which the brothers Crouan, 1. c. p. 199, have referred 

 to Gelidiiun cærulescens Kütz. By means of an original specimen 

 of Maze et Schramm's Algues de la Guadeloupe I have been 

 able to state its identity. Collins has found the same plant 

 (distributed in Phycotheca Bor. Am,, Nr. 783) in the collections of 

 algæ from Jamaica which he has worked out and in his publi- 

 cation: "The Algæ of Jamaica" (Proceedings of the Amer. Acad, 

 of Arts and Sciences, vol. 37, 1901) he calls it (p. 252) Gelidium 

 cærulescens Crouan. Concerning the use of this name he adds : 

 "By the kindness of Dr. Bornet this plant has been compared 

 with authentic specimens from Guadeloupe, and it is the plant 

 referred to by Maze & Schramm, Algues de Guadeloupe, p. 199. 

 Whether it is the plant of Kutzing, Tab. Phyc, vol. XVIII, 

 pi. 56, from New Caledonia, is not certain." As it seemed to 

 me of great interest to know how far Kützing's plant and that 

 of Crouan agreed I sent one of my specimens to M°^° Weber 

 and asked her to do me the favour of comparing my plant with 

 the type specimen in Herb. Kutzing. M*"** Weber obliged me 

 by making such comparison and she tells that there is only a 

 single specimen in Herb. Kutzing namely the one figured in 

 "Tabulæ"; the specimen is much like the figure, the shade of 

 the colour may be a little darker in this plant but that is the 

 only difference. Further M"^^® Weber writes: "The specimen 

 bears tetraspores at the top of almost every branch. Can this 



