F. Børgesen: Rhodophyceæ of the Danish W. Indies. 



77 



cells of these branchlets are the mother-cell of the spermatia. 

 The cells have a rather thick wall and are when ripe about 

 3 — 4// in diameter. 



This species was found in rather exposed localities down to 

 a depth of about ten meters, It was collected in the months 

 January and February and was in a fructifying condition. 



St. Croix: White Bay, and near Buck Island in a depht of about 

 5 fathoms. 



Geogr. Distrib. : Florida, West-Indies. 



5. Liagora megagyna nov. spec. 



Frons cæspitosa, 12 — 14 cm alta, teres, e basi sensim vix 

 attenuata, irregulariter ramosa, ramis inferioribus longioribus, su- 

 perioribus brevibus ramulos parvos obtusos irregulariter dispositos 

 gerentibus. 



Crusta calcarea in specimine exsiccata farinaceo-scabrida. 



Axis centralis ex filamentis crassioribus cellulas subcylindrice- 

 dolioformes continentibus et filamentis tenuioribus, compositus est. 



Stratum periphericum ex filamentis dichotomis, cellulas sub- 

 cylindricas ad apicem ver- 

 sum oblonge-ovales conti- 

 nentibus compositum est. 



Rami carpogonii robusti, 

 recti aut fere recti, ex 3 — 5 

 cellulis brevibus composite 

 Cellula carpogonica brevi- 

 ter conica in trichogynum 

 longum cylindricum pro- 

 ducta. Cystocarpia fere sphæ- 

 rica ex filis carposporiferis 

 composita, plus minus fila- 

 mentis sterilibus, ex cellulis 

 infra ramos carpogonii ortis, 

 circumcincta. 



The ramification of this 

 species is very irregular, 

 sometimes apparently mono- 

 podial, sometimes more or 

 less dichotomous with many proliferations (Fig. 82). 



The frond is terete and the calcification well developed for- 

 ming a continuous covering ; only at the summits of the branches 



Fig. 82. Liagora megagyna nov. spec. 

 Part of a plant. (About 3: 1.) 



