444 BOTANICAL INFORMATION, 
11. Laurencia filiformis, H. and H. (n. sp.) Caule elato filiformi 
setaceo flexuoso pinnatim ramosissimo, ramis alternis longis 
virgatis simplicibus iterumve ramosis, ramulis horizontalibus 
alternis secundisve brevibus elongatisque cylindricis capitatis. 
Hawkes Bay, Colenso, 650.—Allied to L. obtusa, but very slen- 
der, with flexuous stems and branches, and alternate or secund 
ramuli. The ramuli are either a line in length, or drawn out to 
6-8 lines or more. 
12. Rhodymenia Palmetta, Grev. 
Colenso, 645. These specimens are undistinguishable 
from some European forms in our Herbaria. 
13. Rhodymenia ——— —- ? n. sp. (?) fronde membranacea rosea 
cuneata dichotoma, laciniis furcatis patentibus lineari-cune- 
atis, axillis acutis. 
Colenso, 877.—An imperfect specimen, perhaps belonging 
to anew species. 
14. Gracilaria? torulosa, H. and H.— Gigartina torulosa, nobis, 
in Journ. 4. p. 546. 
Colenso, 873.—Mr. Colenso's specimens are much more 
perfect than our former ones. The colour, which had com- 
pletely faded in the specimen from which we originally de- 
scribed the species, is dark purple, changing to various 
tints of red in fresh water. The structure of the stem is 
intermediate in character between that of Gracilaria and 
Gigartina; the centre being that of the first of these Genera, 
the circumference that of the latter. 
15. Iridæa micans, Bory. 
Colenso, 880. 
16. Melanthalia abscissa and Jaubertiana. 
Colenso, 627. 882.—Splendid specimens, which confirm Dr. 
Harvey in the opinion already expressed (ante, Vol. 4. p- 
548) that the M. Jaubertiana is not distinct from the ori- 
ginal abscissa of Turner. 
17. Gelidium lucidum, Harv. 
Colenso, 647. 649. 877. 879. 884. 
18. Ctenodus Billardieri, Kütz. 
