n b 
14 CRYPTOGAMIA ANTARCTICA. [Auckland and 
In an early state the difference between the calyptra of this genus and of Orthotrichum is very considerable, 
being, in the present case, linear and subulate ; but in the latter genus campanulate. We consider Bridel’s defini- 
_tion of this as drawn from more natural characters than that of Schwaegrichen. 
1. MACROMITRIUM longirostre, Schwaegr. ; caule repente, ramis erectis, foliis confertis erecto-patentibus 
lineari-lanceolatis lineis duabus notatis solidinerviis siccitate tortilibus, theca ovali sulcata, calyptra glabra. 
M. longirostre, Schwaeg. Suppl. vol. ii. pt. 2. p. 131. 4.112. Brid. Bryol. Univ. vol. i. p. 310. — Orthotri- 
chum, Hook. Muse. Exot. t. 25. 
Has. Lord Auckland's group and Campbell’s Island; abundant on the trunks of trees near the sea. 
This species varies considerably in colour and in habit ; the leaves are, sometimes, narrower and more spreading 
than in these specimens ; when dry they are always twisted round the stem. 
2. Macromrrrium acutifolium, Brid.; caule repente ramosissimo, foliis lanceolatis valde acuminatis 
tortis nervo subexcurrente, theca ovata striata, operculi rostro aciculari, calyptra glabra. M. acuti- 
folium, Brid. Bryol. Univ. vol. i. p. 736. Orthotrichum, Hook. and Grev. in Edinb. Journ. of Science, vol. i. 
p. 118. t. 5. 
Haz. Lord Auckland's group; on rocks at the top of the hill above Rendezvous Harbour, barren and 
very scarce. 
9. SCHLOTHEIMIA, Brid. 
Peristomium duplex ; exterius dentes sedecim, per paria approximati, siccitate spiraliter revoluti ; interius mem- 
brana conica, in lacinias sedecim pluresve dentiformes insequaliter fissa. Calyptra conico-mitreformis, glabra, basi 
appendiculata, demum lacera. Theca «equalis, exannulata. 
Some species of Macromitrium, possessing a double peristome, have been confounded with this genus: from 
our own experience we are inclined to consider the appendiculate cylindrical calyptra as the most decisive character 
of Sehlotheimia ; the structure of the peristome apparently affording marks of minor importance only. In an early 
stage, a fold of the calyptra is produced downwards below the point of insertion of that organ into the vaginula, as 
in some Splachna, Encalypta, and possibly in other genera of Mosses. This inverted portion, after the lengthening 
of the seta has detached the calyptra, splits into four or more segments; vid. Prare LVIII. Fig. L—11 and 12. 
1. SorLOTHEIuTA quadrifida, Brid. ; foliis oblongo-lanceolatis cuspidatis tortis, theca oblongo-pyriformi 
levi, calyptra glabra. S. quadrifida, Brid. Suppl. Muse. vol. ii. p. 18. Schwaeg. Suppl. vol. i. pt. 2. p. 41. 
and vol. ii. pt. 9. p. 147. t. 57. Brid. Bryol. Univ. vol.i. p.321. (Tas. LVITI. Fig. I.) 
Var. B; caule robusto, foliis magis confertis inferioribus nigricantibus brevius cuspidatis. 
Haz. Campbell’s Island; on rocks and dead bushes, frequent. Var. 8, on rocks at an elevation of 
1200-1400 feet. 
This species approaches the S. Brownii, Schwaeg. (Suppl. vol. ii. pt. 2. p. 52. t. 167), from which it differs in 
the shorter and less excurrent nerve, and from S. nitida in the leaves being straight and not recurved. The leaves 
of var. ß are of a darker colour, more closely and regularly twisted round the stem, and do not readily recover 
in water. 
It is singular to remark how far these tropical forms extend into the southern regions, whence we infer that an 
equable climate is the chief condition they require. In Tasmania, where the climate is more excessive than in New 
Zealand under the same parallel, the Schlotheimie and Macromitria are almost unknown, though in the latter loca- 
Campbell 
lity, and ind 
affect shade a 
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power of sud 
other times. 
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After a very 
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Caules Ses 
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infexis, inferiora 
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capsula parum 
