BuceRiD&. | EURYCEROTIN. 
OSTEOLOGIA AVIUM. 
SECOND SUPPLEMENT. 
EurRYCEROoS PREvosti, Less. 
This bird was described by Lesson in his “Centurie Zoologique” in 1830. The 
following is a part of his description :— 
“T/’oiseau type, du genre nouveau que nous représentons dans la planche 74 est une des 
singularités les plus neuves et les plus remarquables de l’ornithologie. 
“C’est un passage transitoire entre les toucans, les calaos et les enrylaimes ; c’est un type 
cearactérisé a placer comme lieu intermédiaire entre l’erotta,—(Traite d’Ornithologie, p. 260) et les 
buceros. 
« Les enrycéres appartiennent 4 nos passereaux hétérodactyles et 4 notre famille des enrylaimes, 
le genre sera ainsi caractérisé.” 
Bonaparte, in his “Conspectus Genera Avium,” classes it near the Ahamphastide 
after Buceride, which immediately precedes it. G. Rt. Gray classes it among the 
Sternide, to which it has no affinity whatever. 7 
Cranium rounded, without any channel over the vertex to the bill. Occiput very 
round, with a slight depression on each side above the foramen magnum ; orbital 
septum, perforated with two foramina, orbits large; the superior margin slightly 
-reflexed. Bill, with the upper mandible, large; very much raised above, composed of 
cellular bone, deep; lower mandible deep, with a foramen near its hinder extremity ; 
both mandibles pointed. 
Sternum of moderate length, with a deep and wide fissure on each hinder margin. 
Pelvis broad, short. 
Palatine bones prolonged on the exterior and hindee margiy into an elongated 
spine, from the base of which they slope gradually, until they mnie in the centre, 
where they are slightly deflected, broad. 
Furculum much arched anteriorly; the process at the junction of the rami, which 
are rounded, arched, flattened, and the rami long. 
SUPPLEMENT II. B ian 6 
