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



395 



cells. The gland-cells are placed in the same way, having nearly 

 the same shape as in Chrysymenia Agardhii. Also in this plant 

 hyphæ were found growing out from the gland-cells. 



It cannot be denied that this plant, on the whole, comes very 

 near to Chrysymenia Agardhii and that Melville is right in 

 considering it as a variety only of this species. The only difference 

 between the two 

 forms seems to 

 be that the thal- 

 lus in Chrysy- 

 menia planifrons 

 is not divided, 

 being very broad. 



The plant 

 was gathered in 

 the month of 

 March. It was 

 dredged in rather 

 deep water, about 

 30 meters. 



St. Jan: Off 

 Cruz Bay. 



Geogr. 



Di- 



strib.: Florida. 



3. Chrysymenia 

 ventricosa 



(Lamour.) J. Ag. 



J. Agardh, 

 Alg. Medit., 1842, 

 p. 106; Spec. Alg. 

 vol. II, p. 213; 

 Epicrisis, p. 323. 

 F.Bdrge'sen, Some 

 new or little known 



W. I. Florideæ, II, 1910, p. 183, fig. 3. Kuckuck, Untersuch, über 

 Chrysymenia (Beiträge zur Kenntnis der Meeresalgen, 13, p. 218, pl. XIII, 

 figs. 16—21). 



Dumontia ventricosa Lamour., Essai Thalassiophyt., 1813, p. 45, tab. 

 10, flg. 6. 



Halymenia ventricosa Ag., Spec. p. 212. Kützing, Tab. Phycol., vol. 

 16, tab. 86. 



Fig. 378. Chrysymenia ventricosa (Lamour.) J. Ag. 

 A, large cells facing the cavity of the thallus, those 

 in the middle with glands (70:1); B, transverse sec- 

 tion of the wall with two glands (70:1); C, trans- 

 verse section of an older part of the thallus showing 

 hyphæ-like filaments growing out from the innerside 

 of the large cells (125:1). 



