46 



Fig. 43. Acro- 

 chsetium occi- 

 dentale nov. 

 spec. Branch 

 with sporan- 

 gia, the upper- 

 most divided 

 into two spo- 

 res. (About 

 400: 1). 



(Vickers) is the same as this species. But the descrip- 

 tion of M lle VICKERS is so defective that any identifica- 

 tion- by help of it is impossible and as: "Les echan- 

 tillons, mal conserves, ne se pretent pas bien a 

 1'etude", any help from the original material seems 

 also excluded. 



The bases of the two plants in question are 

 apparently alike and they are both living upon 

 Liagora. BORNET and M lle VICKERS refer the plant 

 to Chantransia which suggests that the plant from 

 Barbados had sexual organs ; these I have never 

 found in my plant. As to the arrangement of the 

 monospores of Acr. Barbadense, their form and size 

 nothing is said just as no description is given of 

 the sexual organs. 



St. Croix: Long Point. 



15. Acrochaetium comptum nov. spec. 



Thallus usque ad 1 mm altus et ultra, 

 e filis erectis ramosis sporangiferis et filis 

 endophyticis compositus. 



Spora in filamentis assimilatoricis hos- 

 pitis germinans, magna, oblonga, in cellu- 

 las duas divisa est ; e cellula inferiori 

 fila decumbentia circa filamenta hospitis 

 repentia, e cellula superiori filum singulum 

 erectum gignitur. 



Filum erectum inferne nudum, superne 

 ramosum ramis vicissim plus minus ramo- 

 sis ramos seriates gerentibus instructum. 



Cellulse cylindrical 8 ll// Iata3, ca. 

 35 fjL longa?, chromatophoro parietale pyre- 

 noide laterali instructs. 



Sporangia monospora, plerumque ses- 

 silia, nonnumquam in ramulis unicellu- 

 laribus posita, singula vel bina, in parte 

 basali ramorum uniseriata, ovata, 11 14^ 

 lata et 18 ;i longa. 



This species is characterized by the 



J . . 



fact that the germinating spore is divided part of a plant showing 



by a transverse wall into two cells from the original spore divided 



into two cells. (About 

 the upper ol which an erect tilament 350 : i). 



Fig. 44. Acrochsetiuin 

 compium nov. spec. Basal 



