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DESCRIPTION OF PLATE. 
Skulls (left side view) and wings (dorsal aspect) of nestling Penguins. 
Fie. 1. Skull of Catarrhactes chrysocome. 
geo De »  Spheniscus demersus. 
so 8: »  Pygoscelis adeliz. 
a 4 <5 * » (full grown). 
” 5. ” ” papua. ” 
» 6. »  Aptenodytes forsteri. 
» 7. Hemipterygoid of Aptenodytes forsteri. 
» 8. Skull of Aptenodytes forsteri. 
» 9% Right wing of Pygoscelis adeliz. 
» 10. ‘3 »  Aptenodytes forsteri (later stage). 
9 dds ib »  Pygoscelis adeliz (adult). 
Als. = alisphenoid. Ph. = phalanx 1. 
bp. = basipterygoid process. r.t = radiale, 
C. = condyle. r. = radius. 
dc.1 * % = distal carpalia, 1. 2. 3. uw = ulnar. 
fr. = frontal. u. = ulna. 
h. = humerus. 80. = supraoccipital. 
hept. = hemipterygoid. 8.0.g. = ,, orbital groove. 
Lo. = lateral occipital. Sq. = squamosal. 
Pp. = parietal. I. II. III. = Digits I. II. III. 
Fias. 1-6 and 8. Slightly reduced ({ nat. size). 
Fie. 7. Enlarged. 
» 9. Four times natural size. 
.» 10. Five times natural size. 
» ll. Slightly reduced (7 nat. size). 
