174 Sir W. Jardine’s Illustrations of Ornithology. 
laris. The form of the petiole and leaves resembling the snout 
of the saw-fish, marks them out as belonging to P. hirsuta. 
Potyconexz.—Polygonum viviparum and Oxyria reniformis. 
EmPetRe£.—Hmpetrum nigrum. 
Sarices.—Salix Myrtilloides and two imperfect specimens not 
yet determined. 
Cyrerace®.—HLHriophorum capitatum and E. polystachion. 
I owe an apology to the Society for the length to which these 
observations have extended,—far beyond the slight notices at first 
designed; and yet I have been able but very imperfectly to 
execute the task proposed. But in the progress of this slight 
attempt I have felt more and more convinced of the advantage 
to be derived, in abler hands, towards the improvement of prac- 
tical botany from detailed descriptions of individual plants in the 
case of species liable to much variation. 
XVIII.—AHore Zoologice.. By Sir W. Jarvinz, Bart., 
F.R.S.E. & F.LS. 
[ With two Plates. ] 
No. VI. Illustrations of Ornithology. 
Artamus mentalis (Plate VIII.).—Of the native country of this 
Artamus we have no information. The specimen from which our 
illustration was taken forms part of the ornithological collection 
belonging to the York Philosophical Society, and was noticed there 
by Mr. Gould as distinct from any of the previously described 
species. The principal characters that are at first sight apparent, 
are, the strength and size of the bill, the dark colour of the upper 
plumage, and the small size of the dark space on the chin com- 
pared with the colouring of the same part on A. leucorhynchus, 
where it covers the whole front of the throat and neck. 
The bill is dilated and swollen at the base, and appears to have 
been of the same rich blue colour which prevails in those species 
which have been described from recently killed birds ; towards the 
tip it shades gradually into black. The head, cheeks, mental 
patch, back and wings brownish black with an opake grayish 
shade ; tail black, narrowly tipped with white ; the throat, breast 
and under parts, the rump and upper tail-covers, under wing- 
covers and axillary feathers pure white. 
Entire length of the stuffed specimen, 6,8, inches; bill to 
gape, 1; to forehead nearly ;8; ; of the wing to the end of second 
or longest quill, 5. The accompanying figure is slightly reduced. 
Genus GNatHopON, Jard. 
Gen. Characters.—Bill strong, maxilla hooked, sharp-pointed ; 
mandible cut at the tip mto three distinct angular teeth ; nostrils 
