ARDEIDZ. | OSTEOLOGIA AVIUM. [ ARDEINZ. 
ArpEaA, Linn. 
Herodias. Linn. 
Cranium much the same as in A. cinerea, but with the muscular impressions more 
distinct. The occipital crest more prominent, and orbital septum with a large foramen. 
Palatine bones narrow. 
Sternum longer and narrower, and more convex. Keel not so deep. 
Pelwis also longer and narrower, and with the central channel more marked. 
Ribs narrow. 
Furculum, Coracoids, and Scapule smaller and longer. 
Wing and Leg bones similar, but longer. 
Measurements. 
Tenths. Tenths, 
engthvorhumerus) ke 80 Breadth of anterior ay Arse 
eneth sor pila sie Oe i) ee Maron OL dito ls © ci. a? eee eee 
Length of metacarpus . .. . 40 Depth of Weel. a aes eee mee 
ene Ch foORseniurs 5) fae Ae al AO Ihength iol mead. -  sotun  ) veun arena) 
WREM tn Or UIA Ate. UE ie aa OS isreadthyOfsmeady tls yc se |.) iene 
Length of metatarsus. . . . . Td ienethiohwpelvis uae to eee 
Length of sternum .... . 44 Breadth of pelvis iy) \ 592. se, tunes 
Breadth of posterior margin . . 15 | 
Illustrations. 
Sup. 2, pl. 11. Details, pl. 1], J. 
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