F. Børgesen: List of species. 477 



139. Bostrychia tenella (Vahl) J. Ag. 



140. Lopliocladia trichoclados (Mert., C. Ag.) Schmitz. 



141. Wrightiella Tumanowiczii (Gatty) Schmitz. 



142. Murrayella periclados (Ag.) Schmitz. 



143. Dasya pedicellata Ag. 



144. — mollis Harv. 



145. — caraibica Børgs. 



146. — ocellata (Gratel.) Harv. 



147. — corymbifera J. Ag. 



148. Heterosiphonia Wurdemanni (Bail.) Falkenb. 



var. typica Børgs. 

 var. laxa Børgs. 



149. Dictyurus occidentalis J. Ag. 



150. Falkenbergia Hillebrandii (Born.) Falkenb. 



151. Cottoniella arcuata Børgs. 



Shortly after the publication of part V of this treatise, in 

 which I described this plant, I got a letter from Dr. Howe of 

 New York in which he most kindly called my attention to a plant 

 which he some years ago had described and referred to the genus 

 Sarcomenia, namely S. filamentosa Howe^). I regret very much 

 that I have overlooked it, as it seems to come very near to the 

 plant I have found. 



Fortunately I do not think that the mischance I have had 

 in overlooking Dr. Howe's plant will have any influence on my 

 new genus. U we, namely, consider the species hitherto referred 

 to the genus Sarcomenia we will soon find out that these are very 

 heterogeneous, and this fact has also been pointed out by Gru- 

 Now^), Agardh^) and recently by Howe, 1. c. Concerning this 

 matter I wish to quote here what Howe writes; 1. c, p. 572: 

 ''Sarcomenia filamentosa does not appear to be very closely related 

 to any of the described species of this chiefly Australian genus. 

 The only other species to which monosiphonous filaments are 

 attributed are, so far as we can discover, the Australian species 

 Sarcomenia tenera (Harv.) J. Ag., S. dolichocystidea J. Ag., S. 

 opposita J. Ag. and S. secundata J. Ag., but these are all much 



1) Howe, M. A., Phycological Studies, II. (Bull. Torrey Bet. Club, 32, 

 1905, p. 571, pi. 27 and pi. 29, figs. 1—11). 



2) Grunow, a., Algæ in Reise der Oester. Fregatte Novara, 1870, p. 93. 



3) Agardh, J., Analecta Algologica, Cont. 5, 1899, p. 130. 



