362 
BLUEFIELDS, 
A mucli finer species, as to form, colour, and size, 
was brought me, in May, from the summit of Blue- 
fields Mountain. It was of that curious genus named 
by MM. Dumeril and Bibron TrachycepJialus, having 
a distinct neck, a triangular trunk terminating in a 
point, and an enormous flat head studded with irre- 
gular sharp bony ridges. The three species designated 
by those learned herpetologists are assigned respect- 
ively to Brazil, Hayti, and Cuba ; the present is 
manifestly distinct from either, marked by superior 
size, a peculiar style of coloration, greater develop- 
ment of the bony ridges of the head, and the pro- 
minent projection of the sacrum. It is a far finer, 
though more uncouth, species than any yet described. 
I therefore propose to call it, from its resemblance to 
the moss-grown bark of a tree, the Lichened Tree- 
toad {Trachycephalus licJienatus)* (See Plate YII.) 
* Length from muzzle to cloaca 4-8 inches; breadth of head at 
rictus 1*7; breadth of inflated body 2-25 ; rictus from the muzzle 
along the curve, 1 *5 ; horizontal diameter of eye *4 ; arm from axilla to 
elbow 1 ; fore-arm from elbow to wrist 1 ; hand from wrist to tip of 
middle toe 1 '7 ; breadth of middle pallette *3 ; thigh along front 
margin 2*1 ; tibia 2*1 ; tarsus "8; largest toe 1*8. 
Head, upper surface broad and flat, marked with bony ridges, the 
principal of which are the following : one from the front of each orbit 
passing to the nostril ; one from the back of each orbit passing above 
the tympanum ; and a sinuous one crossing the occiput transversely. 
Under surface of head very flat ; neck constricted suddenly behind 
the rictus. Outline of face, from ear to ear, a semi-oval ; posterior 
edge of occiput forming two salient curves, convex backwards, between 
which is a deep and sharp depressed notch ; the extremity of the 
muzzle forming two vertical ridges with a deep pit between. Canthus 
rostralis forming a sharp and narrow ridge, running nearly straight 
rrom nostril to eye. Height of muzzle equal to half the interorbital 
space. Vomerine teeth set on the margins of two small projecting 
