F. Børgesen : List of species. 455 



30. Acrochætium ernothrix Børgs. 



31. Nemalion Schrammi (Grn.) Børgs. 



32. — loiigicolle Børgs. 



33. Liagora elongata Zanard. 



In the "Algæ of Bermuda", p. 99, Collins and Hervey 

 refer Liagora corymbosa J. Ag. to Liagora elongata Zanardini, point- 

 ing out that it is impossible to separate them from each other. 

 The single dried specimens found I have with much doubt (comp, 

 p. 70) referred to L. corymbosa J. Ag. as I found its anatomical 

 structure agreeing closely with that of L. elongata. I therefore 

 now prefer to consider it as a form of Liagora elongata^ in accord- 

 ance with the opinion of Collins and Hervey. 



34. Liagora valida Harv. 



35. — pinnata Harv. 



36. — megagyna Børgs. 



37. — pulverulenta C. Ag. 



Appendix to Liagora. 



Before I leave the genus Liagora I wish to mention here 

 some remarkable organisms, which I found in several of the spe- 

 cies, when working out my material of this genus, and from which 

 the drawings here reproduced were made at the time (Fig. 421). 

 When I found these bodies, I was inchned to consider them as 

 a kind of endophytes hving in the mucous layer of Liagora. But 

 feeling very uncertain what to do with them, I wrote to 

 Dr. Howe wishing to hear if he also had met with them. 

 Dr. Howe wrote to me that he, too, had found these bodies 

 in several species of Liagora and that he, too, felt rather 

 uncertain what to do with them. At first he was on the 

 point of describing them as representing a new genus of uncertain 

 family, but later after having made more thorough examination 

 he arrived at the conclusion "that these discs seemed to spring 

 from terminal or subterminal cells of the assimilatory filaments 

 of the Liagora^ usually after rejuvenescence of the cell". Dr. Howe 

 told me that he had written a paper describing the discs and their 

 supposed origin, but that he had put it aside feeling not so sure 

 of the matter as he would like to be, before putting it into print. 



