356 



out at the base of the pinnate side-branches. A single almost ripe 

 cystocarp was found (3515); it was nearly spherical, placed term- 

 inally upon a short, thick branch. My plants were gathered in 

 March; M Ue VICKERS has had plants with cystocarps from Bar- 

 badoes collected in July. 



Antheridial stands have been described by ASKENASY, I.e.; 

 according to him the antheridia cover more or less completely the 

 summit of short clavate branchlets. 



This plant has been dredged a few times in deep water only, at 

 a depth of about 12 fathoms. It was growing in a place where strong 

 currents prevail and was gathered with young cystocarps in the 

 month of March. 



St. Jan: In the sound between this island and St. Thomas off 

 Cruz Bay. 



Geogr. Distrib.: West Indies, Canary Isles, Mediterranean Sea, Pa- 

 cific" Ocean. 



IV. Gigartinales. 



Fam. 1. Gigartinacece. 



Subfam. 1. Gigartineae. 



Gigartina Stackh. 



1. Grigartina acicularis (Wulf.) Lamour. 



LAMOUROUX, Essai des Thalassiophytes, 1813, p. 48. AGARDH, J., Spec. 

 Alg., vol. II, p. 263; Epicr., p. 190. KUTZING, Spec. Alg., p. 749; Tab. Phycol., 

 vol. 18, tab. 1. HARVEY, W. H., Phycol. Brit., tab. 104. 



Fucus acicularis Wulf., Cryptogama aquatica, p. 63, No. 50. TURNER, 

 Fuci, tab. 126. 



For more synonyms compare DE-TOM, Sylloge Alg., vol. IV, sect. I, 

 p. 198. 



This species has only been gathered once in shallow water and 

 in a sheltered place. The few specimens found were sterile. 



St. Croix: The harbour of Christianssted. 



Geogr. Distrib.: Seems to occur in all warmer seas. 



