74 PROCEEDINGS OP THE ACADEMY OP 



March VJth. 



Mr, AsHMEAD in the Chair. 



Mr. Ashraead made the following verbal communication regarding 

 specimens of Algae, presented by him this evening and upon a former 

 occasion : 



In the catalogue of Marine Algae from Key West, which I presented to the 

 Academy last April, there were five undetermined species of the genus Cau- 

 lerpa, and two of Laurencia. These, together with some others, supposed to 

 be new, I referred to Prof. Harvey of Trinity College, Dublin. 



I received a letter a few days since from that eminent Algologist, giving the 

 true names, which I have attached to the specimens on the table, as follows : 



Caulerpa mexicana. 



C. PLUMiGERA Harvey. 



0. PASPALOiDES Bory. 



C. SEDOIDES Ag. 

 C. PLUMAKIS Ag. 



Laurencia implicata Harvey. 



L. GEMMiPERA Harvcy. 



There were also three species in that catalogue which I erroneously named, 

 viz : 



SciNAiA furcellAta Bivona, I referred to Halymenia ligulata Ag. 



Ceramium nitens J. Ag., I had supposed to be C. rubrum Ag. — and Cryp- 

 tonemia crenulata J. Ag., I named, (at the suggestion of Prof. Bailey,) Phyl- 



LOPHORA BROADIiEI. 



There is a great similarity iji the external habit of these plants, yet they are 

 well distinguished by the internal structure of the frond, to which I had not 

 applied the microscope. 



In addition to my former catalogue, which is now corrected, I present this 

 evening 



TuRBjNARiA VULGARIS, var. |3. DECURRENS Boryg. 



This plant is interesting as an addition to our Marine Flora. It was known 

 to occur in the West Indies, but had not been detected on our shores, until I 

 found it at Key West. 



Dasya Harvkyi Ashmead. 



This is a new Dasya ; I obtained it at Key West with both kinds of fruit. 

 Prof. Harvey says, " This species is quite new to me, and I feel much gratified 

 by the compliment you pay me, by naming it D. Harveyi." 



Choudria attropurpurea Harvey. 



C. sedifolia Harvey. 



Laurencia papillosa Greves. 



L. cervicornis Harvey. 



Geranium tenuissimum Lyngb. 



Gracilaria armata J. Ag. 

 ■ Tonaria lobata Ag. 



Caulerpa Ashmeadii Harvey. 



In regard to this species. Prof. Harvey makes the following remarks : "As 

 far as I at present know, it is nondescript — but it is not new to me, for I found 

 it myself at Key West, but did not find it growing. It is a very remarkable 

 species, diifering from those of similar habit, in its greater size, and in the ex- 

 treme obtuseness of the pinnje." 



Of this rare species I found but one plant. It was growing in company 

 with Caulerpa plumaris, under the bridge leading to Fort Taylor, in a shady 

 position, and where it was sheltered from the action of the waves. Its fibrous 

 roots penetrated the coral sand for a* considerable extent, from which a number 

 of fronds sprung up at intervals. I collected every fragment I could find. 



[March, 



