200 CRYPTONEMIACEiE. v. 



I have only as yet seen in an immature state, densely scattered through the 



lobes. 



This is the largest and most fucoid plant in Charleston Harbour, and one of the 

 noblest species of the genus. In the belief that it is distinct from the G. Cutlerice 

 of Valparaiso, its nearest relation, I give it the name of my friend Prof Lewis R. 

 Gibbes, as a memento of a delightful day spent in his company on the shores of 

 Sullivan's Island. 



Plate XXVI. Fig. 1. Grateloupia Gibhesii; the natural size. Fig. 2, a section of 

 the frond, magnified. 



2. Grateloupia versicolor, J. Ag. ; " frond (purple, changing to blackish green,) 

 flat, thickish, pinnately decompound ; pinna3 linear, tapering at both ends, dentato- 

 pectiuate at the margin, the young teeth acuminate, at length growing out into 

 horizontal, cuneato-linear pinnules," J. Ag. Sp. Alg. 2, p. 181. 



Hab. At St. Augustin, Pacific coast of Mexico, Liehman. 



3. Grateloupia cimeifolia, J. Ag. ; "frond (blackish green when dry) flat, cuneate 

 or linear, pinnate, here and there dilated and palmate, the margin and disc beset 

 with lesser ciliary processes, segments linear, elongate, rather obtuse." J. Ag. SjJ- 

 Alg. 2, p. 181. Kut2. Sp. Alg. p. 732. 



Hab. La Guayra, Gulf of Mexico, Herb. Binder. 



4. Grateloupia prolongata, J. Ag. ; " frond (violaceous, turning greenish) com- 

 pressed, nearly flat, undulated, interruptedly pinnate and proliferous from the disc, 

 the apex lengthened out and naked ; pinnte linear-subulate from a narrower base, long 

 and short intermixed together." J. Ag. Sp. Alg. 2, p. 181. KUtz. Sp. Alg. p. 730. 



Hab. Pochetti, Pacific coast of ]\Iexican Republic, Liebman, (v. s. Herb. T. C.D.) 



5. Grateloupia j^&ma, Ag. ; frond piano-compressed, pinnately decompound and 

 proliferous from the disc, pinnaj narrowed at base, linear, acuminate, the lowest 

 longest, and often pinnulate, the upper sub-simple ; nuclei numerous, immersed in 

 the disc of the pinnas. J. Ag. Sp. Alg. 2, p. 180. Kiitz. Sp. Alg. p. 730. Han. 

 Phyc. Brit. t. 100. Fucus filicinus, Turn. Hist. t. 150. 



Hab. Apalachichola, Florida, Mr. Lounshury. (v. s. in Herb. T. C. D.) 



I have seen but a single specimen, which appears identical with some of the Medi- 

 terranean forms of this variable plant. 



