396 ALGjE GLOIOCLADEiE. [Palmella. 



nally, but whitish within. It is moist, but not gelatinous, very friable, 

 and, under the microscope, is found to consist of small pellucid bodies, 

 of various shapes, in each of which are lodged 1 — 3 minute sphaerical 

 granules." Carm. MSS. 



94. Palmella. Lyngb. Palmella. 



A polymorphous gelatinous frond, filled with scattered glo- 

 bular or elliptical granules. — Name ; ncikfto;, vibration ; — the 

 fronds (if fronds they can be called) are loosely gelatinous. — 

 In natural affinity, this genus stands exactly intermediate be- 

 tween Tetraspora (to which it is allied by P. terminalis), and 

 Noctoc; thus connecting the great Tribes of Ulvacece and 

 Oscillator ieai, which, at first sight, appear so little related to 

 each other. 



* Granules elliptical. 



1. P. protuberans, Ag. (soft shapeless Palmella); thick irregu- 

 larly lobed very soft green, the granules elliptical. — Ag. Syst.' 

 Alg. p. 14. Grev. Crypt. Fl. t. 243. f 1. — Ulva protuberans, 

 E. Bot. t. 2583. 



Moist rocks, among mosses. — An inch or two broad, soft and gela- 

 tinous. 



2. P. cruenta, Ag. (purple Palmella); " frond crust-like very 

 thin of a dark blood colour." Grev. — Ag. Syst. Alg. p. 15. Grev. 

 Crypt. Fl. t. 205.— Tremella cruenta, E. Bot. t. 1800. 



On damp walls, chiefly limestone or whitewashed; often in cellars. — 

 It forms extensive patches of a blood-red or purple colour. — " Under 

 the microscope the structure is very obvious ; the gelatinous frond 

 swells into globose portions, unequal in size, filled with a multitude of 

 roundish or oval granules." Grev. 



3. P. botryoides, Lyngb. (small clustered Palmella); " minute, 

 fronds densely crowded globose somewhat lobed green sub- 

 orbicular, granules elliptical." Grev. — Ag. Syst. Alg. p. 14. Grev. 

 Crypt. Fl. t. 243./. 2. — Byssus botryoides, Huds. 



On heathy places, in moist situations, common. 



4. P. montdna, Ag. (Mountain Palmella); between gelatinous 

 and coriaceous much and variously lobed curled dark-purple, 

 granules crowded frequently quaternate. Hook. — Ag. Syst. 

 Alg. p. 14. — P. alpicola, Lyngb. Hydroph.Dan. t. 69. — Ulvamon- 

 tana, Lightf—E. Bot. t. 2193. M'Culloch, West. Isles, v. 2. 

 p. 413. t. 30. 



On the mountains, Isle of Skye and W. coast of Scotland. Glen 

 Catcol, Arran, Dr. M'Citlloch. Lying on the ground, but not attached 

 to it, in stony moist places on Goat-fell, Arran, Hooker. — According 

 to Lightfoot, this is the " Mountain Dulse" of the Scotch, and " the 

 Highlanders wash it, and rub it between their hands in water, so as to 

 make a paste, with which they purge their calves." On the mountains of 

 Arran, this lies unattached among loose wet stones, covering them in a 

 straggling manner to a considerable extent. Each frond is an inch or 



