314 ALGM INARTICULATiE. [Enteromorpha. 



floating). Grev. Alg. Brit. p. 179. — Solenia intestinalis, and 

 S. Bertolo?ii, Ag. Syst. Alg. p. 185 — Ulva intestinalis, Linn. 



Ag m Sp. Alg. v. 1. p. 418. — Scytosiphon intest., Lyngb. 



/3. crispa ; frond compressed, the margin crisped and curled. 

 Grev. — Solenia intestin., var. crispa, Ag. — Dill. Muse. t. 9./. 7. 

 On the sea-shore and in ditches and pools, both of salt and fresh 

 water, frequent. . Spring, Summer.—" Fronds closely aggregated, 

 swelling from a slender, filiform base to several lines in diameter round- 

 ed, inflated, and puckered in various ways, a foot or more in length, of 

 a membranous structure, and pale-green colour. The var. crispa gene- 

 rally grows solitary, attaining the length of 5— 6 feet, and upwards of 2 

 inches in diameter. It decays gradually from the extremity downward, 

 and on the edge of the decayed part, the granules are easily discer- 

 nible, very minute, and with little or no interval between them." Carm. 



3. E. compressa, Grev. (compressed Enteromorpha) ; frond 

 tubular linear or filiform simple or branched subcompressed the 

 branches elongated attenuated at the base. — Grev. Alg. Brit. 



p. 180. t. 18 Solenia compressa, Ag. Syst. Alg. p. 186. 



JJlva compressa, Linn. — Ag. Sp. Alg. v. 1 — (3. prolifera ; 



frond somewhat inflated throwing out capillary branches 

 on all sides. Grev. — L ha prolifera, Fl. Dan. t. 762./. 1. — 

 Scytosiphon compressus, var. crispatus, Lyngb. Hydroph. Dan. 



p. 6. 



On various substances in the sea, abundant. 0. Spring — Autumn. 



« Fronds gregarious or tufted, from 6 inches to 3 feet or more in 



length, and from half a line to two inches in diameter, compressed or 

 collapsed and wrinkled, almost naked, or sending off innumerable long 

 slender simple branches chiefly from the margin. I am much inclined 

 to the opinion expressed in the Flora Scotica of Dr. Hooker, that S. 

 intestinalis is merely one of the numerous forms which this very variable 

 species assumes, and which run so insensibly into each other, that any 

 attempt to arrange them into varieties would prove equally difficult and 

 useless." Carm. MSS. 



4. E. Linkidna, Grev. (Link's Enteromorphd) ; frond cylin- 

 drical tubular filiform reticulated pellucid of a very pale 

 green colour membranaceous (rigid when dry) much branched, 

 branches attenuated. Grev. Alg. Brit. p. 182. 



In the sea ; on the coast of Appin, Captain Carmichael. © . Summer. 

 — The specimens of this in Captain CarmichaePs Herbarium do not 

 appear to me to differ from a not unfrequent state of E. compressa, ex- 

 cept in being a little more rigid than is usual with that species. 



5. E. erecta, (erect Enteromorpha); fronds latticed filiform 

 tender, the branches and branchlets attenuated erect free. Carm. 

 MSS. — Scytosiphon erectus, Lyngb. Hydroph. Dan. p. 63. 

 t. 15. — Solenia clathrata, var. confervoidea, Ag. Syst. Alg. 

 p t 187. — Enteromorpha clathrata, (3., Grev. Alg. Brit. p. 181. 



In the sea, on stones about half-tide level. Appin, rare, Captain Car- 

 michael. Firth of Forth and Isle of Bute. Br. Greville. . Spring. 

 — " Fronds closely gregarious, 3 — 4 inches long, cylindrical, about the 



