CETACEA. 51 
‘The lower jaw appears to increase in length in front, for in the 
Ider specimens the symphysis is more, and in the younger ones 
ss, than half the entire length of the jaw. 
e. Ear bones. Presented by H. H. Russell, Esq. 
f,g. Teeth, various. 
 h. Section of a tooth. 
_ There is the skull of a very young specimen, probably a foetus 
of this animal, in the Museum of the College of Surgeons: the 
bones are of a very soft structure. The following are its mea- 
surements :—_ 
Barer ere, CNIS (Satake aa eS Lelawiee es 32 inches. 
Soper OL ROSE. 2st os id 2s oo wow wim 90-5, 
Benath of lower, jaw... 0:25). + op-24s ys Es 
Length of symphysis .............. ee 
Width at notch of nose ............ 176; 
Width of condyles apart............ 16°6 ,, 
i Boner (Cetac. t. 17, 20-22, from the church of Scherclinge, 
t. 18,19, 27, Mus. Paris) fioured the skull of this whale. He 
represents the nose of the skull as nearly twice and a half as long 
s the width at the notch. 
‘J _, rhe following table exhibits the measurements of the lower jaw 
Length, From back teeth to Number 
i entire. articular surface. of teeth. 
No. ten) 110. ff) in. 
1. 16 3 5 6 25°24, New Bedford. 
2. 1 ae | 5 6 25°27 
3. Bird 3.9 20 — (none). 
» 4. 7 10 3 2 26°23 
5. Bhpeieny ae es Seer oe 23? 23? all pointed. 
6. 0 3 at Ga 25°24 
7. 15 0 4 9 26°25 
8. 1 Wd: 3 2 24°24 
e 9. 8 2 3.8 23 
Jackson, Boston Journ. N. H. v. 153. 
_ The young is quite black ; remarkably smooth and elastic, like 
India rubber ; from a line with the anterior extremity of the head 
to the top of the tail, 16 feet ; to the rudimentary dorsal fin, 9 feet ; 
to the anterior fin, about 4 feet ; to the vent, 10 feet 2 inches; 
to the eyes, 3 feet 2 inches; to the external orifice of ears (which 
was about the size of a goose-quill), 3 feet 8 mches ; to the angle 
of the mouth, 2 feet 10 inches; vertical diameter ‘of the head, 
just in front ‘of the opening of the mouth, 2 feet 10 inches ; 
a c2 
