PHACTONIDE. | OSTEOLOGIA AVIUM, [ PHACTONYN.E. 
Puatton, Lin. 
/Ethereus, Lin. 
Cranium long and hollow between the edges of the orbits; orbital septum perforated 
with a large foramen ; a deep tranverse indentation at base of the bill. Occiput per- 
pendicular ; occipital ridge well marked. 
Sternum rather short in its horizontal position, with a moderate-sized fissure on each 
side of the keel, which is much elongated anteriorly, and deep. 
Pelvis broad ; the os pubis much elongated ; ischiatic foramen large. 
Ribs thin and light, styliform processes short. 
Furculum flattened ; broader at its junction with the keel, which is a little below 
the point. 
Coracoids light ; much expanded at their junction with the sternum. 
Scapula very light; very slightly expanded near its hinder extremity; blunt at the 
end. 
Wingbones long. 
Legbones short, very weak ; metatarsi with a deep groove down the front. 
Vertebre strong, broad, 
The birds of this genus very much resemble the Sternide in the form of the 
sternum and pelvis. 
Measurements, 
Tenths. Tenths, 
Length of humerus. . . . , 30 Marcin of-dittot.%. 4. Pe we LE 
enstiorulnas jo 4 + 4) 88 Breadth of anterior . -, 
Length of metacarpus . , . . Lod Marcinsof ditto (2 25. 0) = 24 
Tenethotfemun. 4. = « 10 Depth of keel ee eS 
Jiength oftibia . . .. .«. Is lenetheot head jo. = >. 38 
Length of metatarsus . . . . 8 Breadth ofhead . , ... . 14 
Length ofsternum , ... . 22 irene om pelyise msn 6 ie. | LO 
Breadth of posterior. :; . . . Breadth of pelvist.« ©. -. . 4 12 
NUMBERING OF VERTEBRE&. 
Cer. Dor. Sac. Cand, 
13 8 9 
40 
