RECENT VIEWS ON THE TRILOBITES. 205 
Lindsaya viridis, Colenso.—Banks of the Waikato, near the 
Tamahere Narrows (Mrs. Gubbins). Not previously known 
from any part of the Waikato country. 
Adiantum formosum, Br—Although this species has long been 
known to occur in the north of Auckland province, no one has 
yet specified the exact locality, and considerable misapprehen- 
sion exists respecting it. In the “Handbook,” the habitats of 
Kaipara and Whangarei are given, on the authority of Mrs. 
Jones’ little book. This statement has been copied into several 
later publications, although it is certainly incorrect, as the plant 
is not known in either district, properly so called. Mr. Kirk 
has pointed this out (“ Trans. N. Z. Inst.,” 3, p. 173) ; but, being 
misled by imperfect information, has fallen into the error of 
assigning the West Coast as the proper habitat. The exact 
locality is the valley of the Northern Wairoa River. Ina boat 
voyage made up this stream in 1875, specimens were first 
observed about six miles above Dargaville ; but the plant is 
apparently rare until the “great bend” of the river is passed. 
It then becomes plentiful in the swampy forests fringing the 
banks, in many places covering acres of ground, and attaining a 
height of over four feet. A little below the old Mission Station 
at Tangitiroria it thins out, and is only occasionallly seen ; while 
before reaching the junction of the Mangakahia and Wairua it 
has altogether disappeared. 
Cheilanthes tenwifolia, Swz.—Mohaka River, Hawke’s Bay (E. 
Craig). 
ell drummondu, Kunze.—Near Papakura; hills by 
the Waikato River, near Mercer; north-western side of Lake 
Waikare. Not previously recorded from the south of the 
Auckland Isthmus. 
Pel N I VIEWS ON, THE TRILOBITES. 
_—_—__ oO 
BY CHARLES CHILTON; BA. 
In the “ Bulletin of the Museum of Comparative Zoology at 
Harvard College,” Vol. VIII. (April, 1881), there is an important 
“paper by Mr. C. D. Walcott, intituled “ The Trilobite : New and 
Old Evidence relating to its Organisation.” As this may not 
be accessible to many in New Zealand, a short account of the 
results arrived at by Mr. Walcott may not be out of place. 
The trilobites, as everyone is aware, are fossils that have 
been known for a very long time ; immense numbers of speci- 
mens have been found, many of them very perfect ; yet for long 
nothing was known but the hard dorsal shell and the hypostoma ; 
and though we now, thanks to Mr. Walcott’s laborious re- 
searches, know a little about the appendages, still our knowledge 
is very fragmentary and unsatisfactory. 
