chthono- 
ation in 
his pes 
a satire d 
ted in New 
Falklands, ete.) CRYPTOGAMIA ANTARCTICA. 193 
Has. Berkeley Sound, Falkland Islands; on moist rocks; Cockburn Island, Graham’s Land; very 
abundant. 
A highly interesting species, because it is one of the very few terrestrial plants that have been gathered on 
the limits of vegetation both in the Northern and Southern Hemispheres. It was collected in Spitzbergen, (in 80°. N.) 
by the officers of Captain Parry’s Expedition towards the North Pole, and is a native of many intervening latitudes. 
We have carefully compared these specimens with Agardh’s original ones of U. crispa, from Norway, and find them to 
be identical. The Cockburn Island specimens are in fine fruit. 
6. Urva cristata, Hook. fil et Harv.; pusilla, stratum continuum furfuraceum efficiens, frondibus cris- 
patis lacunosis latioribus quam longis supra medium in laciniis perplurimis fissis, laciniis filiformibus fistu- 
losis tortis pluries divisis processubus corniculatis simplicibus ramosisque undique obsitis, substantia tener- 
rima, sporis confertis irregulariter dispositis rarius quaternis. 
Has. Kerguelen’s Land ; in moist clefts of rocks overhanging Christmas Harbour, growing with 1 
pothallus anastomosans. ‘ 
Frondes singule 2-6 lin longe, latiores quam long, sessiles, basi contracte, leete virescentes, fragiles, margi- 
nibus crispatis, superficie lacinioso v. profunde rugoso; laciniis perplurimis gracilibus compressis v. teretibus, fistu- 
losis, processubus divaricatis undique ornatis. 
A species so closely resembling the U. crispa, that we at first sight confounded it with that plant : it is, however, 
abundantly distinct, in the much smaller spores, and in the curious long and slender lacinise of the frond, which are 
tubular in the specimens we have examined, and, as well as the margins of the sessile frond, are studded with short 
simple or divided horn-like processes, or abbreviated ramuli. 
53. MASTODIA, Hook. fil. et Harv. 
Frons plana, membranacea v. subcarnosa, viridis, late expansa, inordinate areolata. Fructificatio duplex : 
1°. Sporidia granulseformia, in areolis indefinita (ut in Ulva) fronde immersa. 2° Conceptacula mammeeformia, fronde 
immersa, apice mamilla instructa, materie grumosa repleta, sporasque ellipticas foventia.—Genus Ulvee prowimum, et 
nisi presentia conceptaculorum nullo modo distinguendum. 
1. Mastop1a tessellata, Hook. fil. et Harv. Ulva tessellata, nobis in- Lond. Journ. Bot. vol. iv. 
p.297. (Tas. CXCIV. Fig. IL) 
Var. a. fronde tenuissima, laciniis longioribus. 
Var. 8. fronde carnosa siccitate rigida, laciniis rotundatis. 
Haz. Kerguelen's Land; var. a. in streams of fresh-water. Var. 8. on stones occasionally exposed in 
a fresh-water lake. 
Frons foliacea, 1-2 unc. lata, luride viridis, subplicata, siccitate rigidiuscula, suberecta v. in var. 8. horizontaliter 
expansa, sub lente granulis majusculis opacis in areolas quadratas compositas dispositis pulcherrime quasi tessel- 
lata, demum in lacinias plurimas undulato-crispatas rotundatas fissa; areolis quadratis, lineis hyalinis circum- 
scriptis, granulis magnis quaternis. Conceptacula exemplaribus omnibus nobis visis perplurima, ad angulos areola- 
rum majorum sita, elevata, mammeeformia, apice pallidiore, crassa et carnosa, intus cava, materie grumosa sporisque 
lineari-ellipticis viridibus immixtis farcta. 
Erroneously described as a marine species in the London Journal of Botany: Even when destitute of fruit it is 
specifically very distinct from any Ulva, especially in the great size of the granules, and their comparative remoteness 
from one another. The curious hemispherical bodies are abundant in all the specimens, and resemble in some degree 
