CATALOGUE OF MARINE ALG^ OF WEST INDIAN REGION. 17 



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

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

 patentibus, apicibus plus minus clavatis, interdum attenuatis, basi 

 constricta. 



Koot 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, Ib). 



This species differs from all the varieties of C. dasyphylla 

 Woodw. or C. Baileyana Harv. 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 ramosa, 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, 

 figs. 2 a, 26). 



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

 the same proportion to C. teiiuissima Good, in this respect that 

 Ceramium byssoideum Harv. does to C. gracillimum Ag. The 

 fructification is unknown. Colour pale brownish pink, becoming 

 dark brown when dry, and staining the paper the same colour. 

 Of this species but two specimens were gathered, both growing at 

 low-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 

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

 an undescribed new form. J. C. M. 



ACANTHOPHORA MuscoiDEs Bory. Barbadoes, Dickie \ Guadeloupe, 

 Maze I Santa Cruz, Miss Dixl Cuba, R. de la Sagra. 

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

 Eaton, No. 8). 



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

 A. DELILEI Lam. Florida, Harvey, Melviil ! 

 Geogr. Distr. Mediterranean, Red Sea. 



A. THIERII Lam. Grenada, Murray ! Barbadoes, Dickie ! Guade- 

 loupe, Maze \ Martinique, Duperrey. Santa Cruz, Miss Dix 

 (fide Harccy}. St. Thomas, Oersted, Duehassainy, Hohenack. \ 

 No. 389. Cuba, R. de la Sagra. Mexico, Liebnian. Florida, 

 Harvey, Melviil, Hooper ! (in Farlow, Anderson and Eaton, 

 No. 9). Bermuda, Kemp, Hein. 

 f. GRACILIS Crn. Guadeloupe, Maze \ 



Geogr. Distr. Brazil, Europe (Biarritz). 

 A. INTERMEDIA Crn. Guadeloupe, Maze ! 



MARTENSIA PAVONIA J. Ag. Guadeloupe, Maze ! Santa Cruz, Du- 

 , lib. 



