CATALOGUE OF MARINE ALGM OF WEST INDIAN REGION. 333 



0. tenuissima J. Ag. Guadeloupe, MazS\ 

 f. crassa Orn. Guadeloupe, Maze ! 



Geogr. Distr. Atlantic (Europe and America), Mediterranean, 

 Australia. 

 C. Harveyana J. Ag. ? Guadeloupe, Maze ! 

 Geogr. Distr. Tasmania. 



C. dasyphylla J. Ag. Grenada, Murray ! Guadeloupe, Maze I 



Florida, Harvey ! Mrfvill ! 

 Var. sedifolia J. Ag. Florida, Harvey, Melvill ! 

 f. gracilis J. Ag. Guadeloupe, Maze ! 



Geogr. Distr. Atlantic (Europe and America), Australia. 

 C. tenera Crn. Guadeloupe, Maze I 



Chondriopsis cnicophylla Melv., sp. nov. — Fronde robusta, 

 divaricato-ramosa, ramis decompositis,alternatis,ramulis squarrosa- 

 patentibus, apicibus plus minus clavatis, interdum attenuatis, basi 

 constricta. 



Root a small disc. Main stem robust; zigzagged frond with 

 divaricate spreading branches, alternate, decompound ; the ultimate 

 ramuli squarely patent ; apices of the ramuli more or less clubbed, 

 but occasionally attenuate, constricted at the base. Tetraspores 

 immersed in the ramuli ; conceptacles not present ; colour, when 

 fresh, dark purplish. (Plate 284, figs, la, lb). 



This species differs from all the varieties of 0. datypkylia 

 Woodw. or C. Baileyana llarv. I have seen, in its divaricate 

 growth, and squarely-set patent ramuli, giving a thorny character 

 to the frond. One specimen alone was found on the sandy beach at 

 Cedar Keys, West Florida, on the Gulf of Mexico, after a somewhat 

 severe gale, 8th March, 1872.— J. C. M. 



Chondriopsis leptacremon Melv., sp. nov. — Fronde tenui, 

 subtili, simpliciter ramos;!, ramulis alternatis, elongatis, apicibus 



subattenuatis, basi constricta. 



Plant somewhat csespitose at base ; frond extremely slender and 

 graceful, simply branched ; ramuli elongate ; apices of the ramuli 

 slightly clavate or subattenuate, constricted at the base. (Plate 284, 

 fa gs. 2 a, 2 b). 



This is the smallest and slenderest species of the genus, bearing 

 tjie same proportion to C. tevttissima Good, in this respect that 

 Ueramium ky$mdmm Harv. does to C. grariUimum Ag. The 

 fructification is unknown. Colour pale brownish pink, becoming 

 <*ark brown when dry, and staining the paper the same colour. 

 °f this species hut two specimens were gathered, both growing at 

 ] <jw-water on a coral slab below Fort Taylor, at the S.W. extremity 

 of the Island of Key West, S, Florida : one of the specimens was 

 Emitted to Prof. J, G. Agardh, who pronounced it almost certainly 

 a & undescribed new form.— J. C. M. 



Acanthophora muscoides Bory. Barbadoes, Dickie ! Guadeloupe, 



teaz&l iSanta Cruz, Mm Dixl Cuba, R. de la Sagra. 

 Florida, Harvey 1 Palmer \ Hooper] (in Farlow, Anderson & 

 Eaton, No. 8). 

 Geogr. Distr. Warm Atlantic (Africa and America). 



