KE VISED LIST OF MARINE ALG.'E. 89 



of bead-like cells. From several of these filaments there arise 

 the female organs, each consisting of a carpogenous cell, 

 a miicellular trichoj^hore and a long dehcate trichogyne 

 which passes outwards and appears on the sm^face of the 

 ramulus as a short hair. After fertihzation the carpogenous 

 cell produces a mulberry-hke mass of carpospores which 

 oraduallv increase in size and deepen in colour. Pollinoids 



Since the printing oft' of the pages on which the accompanying account of 

 the cystocarps of Catenella apuntia occurs, better sections of very 3'oung cys- 

 tocarpic ramuli, together with critical remarks kindly furnished me by Prof. 

 Schmitz, have led me to considerably modify my interpretation of the struc- 

 ture of the " fruit " of this species. In place therefore of the sentences from 

 "The ramulus is spherical" on page 88 to "with that genus" on page 89, 

 read : — " The ramulus is spherical and shortly stalked. "When young it con- 

 sists of a central axial filament composed of four or five cells, surrounded by 

 a reticulum of short hyphse from Avhich branched chains of coloured cells 

 arise as in the ordinary vegetative ramulus. In the iimer rind of the ramulus 

 there arise very numerous trichophoric systems, each composed of a long and 

 delicate trichogyne which appears on the surface of the ramulus as a short 

 process, and a trichophoric portion of one or sometimes two cells. After fer- 

 tilization of the trichogynes (many or all) chains of carpospores are given oil 

 from the reticulum of hyphae surrounding the axis, and the terminal cell of 

 the axial row enlarges to become a nourishing cell for the carpogenous reticu- 

 lum. Frecpiently secondary vegetative cells appear round the trichophoric 

 cells, but these do not (as I at first thought) become carpospores. After 

 fertilization the trichogynes wither and the carpospores are seen forming a 

 dense spherical layer among the sterile hyphse which lie between the rind 

 cells and the inner reticulum." 



For further details I would refer the reader to my Linnpean paper soon to 

 be published. I may add that Plate II. is draAvn in accordance with this 

 revised account. 



L. Oi i>iail, i:\.li^lt;bect :, J- Liiiiii -L. ;, xxix«^i.^^ a.. ; 



C.jubata, Kiitz. 



I. of Man. 



^System, uber d. Florideen, Flora, 1889. 



