CONFERVACEiE. 81 



and repeatedly divided ; the ramuli slender, few and subdistant. The articulations of the 

 branches are very many times longer than broad; those of the ramuli 5-6 times their 

 breadth. The endochrome is generally dissipated in drying. When dry the specimen 

 retains a brilliant green and has a silky gloss. 



14. Cladophora gracilis^ Griff.; filaments very long, capillary, flexuous, silky, much 

 branched, bright yellow-green ; main branches entangled, sparingly divided, angularly 

 bent ; ultimate ramuli pectinate, secund, much attenuated, straight, and very long ; 

 articulations 3-5 times as long as broad. Griff, in Wyatt, Alg. Danm. No. 97. Harv. 

 Phyc. Brit. t. 18. Kutz. Sp. Alg. p. 403. 



Hab. Growing on Zostera, and the various Algae, in the Laminarian zone. Nahant, 

 Mrs. Mudge. Beesley's Point, Rhode Island, Mr. Ashmead (67.) Seaconot, Rhode 

 Island, Mr. Olney. (v. v.) 



Filaments more or less densely tufted, 4-12 inches long, (about 4 inches in the 

 American specimens), capillary, soft and silky, much branched ; the main branches 

 rather more robust and bent in a zigzag manner, sometimes very flexuous, and fre- 

 quently more strongly coloured than the rest of the plant, set throughout with lateral, 

 decompound branches all whose divisions are patent ; and the ultimate branchlets 

 pectinated with long, simple, secund ramuli. Colour a yellow-green. Substance soft 

 and silky, but not gelatinous. Articulations 3-5 times as long as broad. It does not 

 strongly adhere to paper in drying. 



Mrs. Mudge's specimens are small, but in other respects very similar to English 

 ones. Those from Mr. Olney and Mr. Ashmead are less true to the type. 



15. Cladophora brachyclados, Mont. ; filaments very slender, tufted, sparingly 

 branched ; branches long and virgate, set with distant, alternate, erecto-patent branch- 

 lets, which are pectinated along their upper sides with very short, erect, or incurved 

 ramuli, of 1 or 2 cells ; articulations of the branches 5-6 times as long as broad. Mont. 

 Cuba, p. 13, t. 4. Sylloge PI. Crypt, p. 456. C. Montagneana, Kiitz. Tab. Phyc. 

 vol. 4, p. 9, t. 41, Jig. 2. 



Hab. Mouth of Rio Bravo, on the sea-beach. Dr. Schott. (v. s. in Herb. T.C.D.) 



The specimen received from Dr. Schott is a very imperfect one, but its filaments, 

 when examined under the microscope, show so many characters in common with those 

 of Montague's C. brachyclados from Cuba, with an authentic specimen of which I have 

 compared them, that I am unwilling to separate forms so similar. The short, mostly 

 single-celled ramuli are characteristic. 



] 6. Cladophora luteola; filaments very pale yellow-green, tufted, excessively slender, 



M 



