No$toc.~\ 



AI.GM GLOIOCLADEjE. 399 



expanded polymorphous plicato-undulate green. — Ag. Syst. Alg. 

 p. 18.— TremeUa Nostoe, E. Bot. t. 461. 



Gravelly soils, rocks, pastures, &c, common. 



2. N. muscorum, Ag. (papillose Nostoe); frond polymorphous 

 mostly orbicular concavo-convex papilloso-tubercular subcoria- 

 ceous. — Ag. Syst. Alg.p. 19. 



On calcareous rocks and the mosses which cover them. Appin, Capt. 

 Carmichael. — " Fronds gregarious, an inch or more in diameter, of vari- 

 ous forms, but inclining more or less to the orbicular, convex above and 

 concave in an equal degree underneath, of a firm dry consistence, and 

 made up of small roundish lobes or papillae. It bears a strong resem- 

 blance to Collema crispum; but is much firmer and less gelatinous." 

 Carm. JISS. 



3. N. vesicdrium, Dec. (vesicated Nostoe); " terrestrial, frond 

 vesicular cartilaginous full of viscid juice." — Ag. Syst. Alg. 

 p. 19. 



Road-side near Perth, G. A. IV. Arnott, Esq.— I have seen no speci- 

 mens of this, which I admit on my friend Mr. Arnott's authority. 



4. N. folidceum, Ag. (foliaceous Nostoe); ca?spitose mem- 

 branaceous plicato-rugose somewhat erect. — Ag. Syst. Alg. 

 p. 19. 



On clayey ground, kept constantly damp by the oozing of water. 

 Appin, Capt. Carmichael. — " The fronds grow in circular tufts, 5—6 in- 

 ches in diameter. They are about an inch broad, membranaceous, 

 plaited, curled, wrinkled, of a dirty umber colour." Carm. JfSS. 



5. N. 7nicrosc6picum, Carm. (minute Nostoe); fronds densely 

 aggregated very minute polymorphous immersed in a blackish 

 crust. 



On exposed calcareous rocks, among mosses. Appin, Captain Car- 

 mickael. u Wilderness," near t'lonmel, W. II. Harvey. — " Frauds gre- 

 garious, from a line to one-twentieth of a line in diameter, ami varying 

 in form from globular to linear, of an olive or fulvous colour. In the 

 immature fronds there are no more than 1 — I filaments." Carm. MSS. 

 — A curious and very distinct species, almost hyaline under the mi- 

 croscope. 



(>. X. humijuswn, ('arm. (incrusting Nostoe); fronds very 

 minute BHDglobose fleshy hrownish-green, densely aggregated 



in a w idely spreading b! ratum. 

 On rocks exposed to the sea-spray, spreading over the naked earth. 



Appin, Captain Carmichael. — " Frond not more than one-fourth of a 



line in diameter, spreading over the naked soil in a dark-green crust, 

 firm, fleshy and rather opaque." Carm. 



2. Olive-green, tubmereed, 

 * Glob 



7. N. priiiiiforno. Air. ( /'/" ni-shopt / \ uii.il t a. ln-d 



globose or compressed coriaceo-gelatinotu smooth. — Ag. Sytt. 

 Alg.p* 19. Lyngb. Hydroph, Don. /. 68. 



