

Some new or little known West 

 Indian Floridese. 



By 



F. Borgesen. 



(With plates I— II.) 



J_Juring the winter 1908 — 09 I have been occupied with 

 the determination of some Floridese collected in the sea around 

 the Danish West Indies. In the following pages I give the 

 description of some new species found here together with remarks 

 on some already known. 



Chautraiisia crassipes nov. spec. 



Thallus minutissimus, 50 — 70 p. vel paulo altior. Cellula 

 basalis major, subglobosa-cylindrica, parietiebus crassis instructa, 

 circiter 12^ lata, fila monilifor- 

 raia 1 — 2 (vel plura), erecta aut 

 decumbentia emittens. Fila e 

 basi ramosa, ramulis brevibus 

 uniseriatis, e cellulis paucis (1 — 6) 

 compositis. Cellulse breves, dolii- 

 formes aut subglobosse , 5 — 7 fx 

 latse et 5 — 9 fx longae. Versus 

 apicem ramuli gradatim tenuiores, 

 ultimi 4 — 5 {x lati. Pili hyalini, 

 solum in apicibus ramorum circiter 

 1 IX lati occurrentes. Monospo- 

 rangia ovata, sessilia, lateralia, 

 uniseriata 5—6// lata, 6—8^ longa. 

 Organa sexualia desunt. 



Fig. 1. Chantransia crassipes sp. nov. 

 A and B, two sterile plants growing on 

 Centroceras; B, with a hair (300:1). C, piece 

 of a branch with monosporangia (300 : 1). 

 V, plant with monosporangia and emptied 

 ones (150:1). 



I have found only a few specimens of this small plant growing 

 epiphytic upon Centroceras and Hijpnea. The basal cell is short 

 subcylindric — barrelshaped with very thick walls (Fig. XA); it 

 is fastened to the surface of the host plant by means of a rather 

 thick layer 



Botanisk Tidsskrift. 30. Bind. 



of cementing substance in accordance with what 



