362 BLUEFIELDS. 



A much 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 Trachycephalus, 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 lichenatus).* (See Plate VII.) 



* Length from muzzle to cloaca 4-8 inches; breadth of head at 

 lictus 1*7; breadth of inflated body 2-25 ; rictus from the muzzle 

 along the cur%'e, 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 



