699 
1908-9.] The Skeleton of a Sowerby’s Whale. 
with its corresponding carpale, which belonged therefore to the same digit. 
Mi had an unossified phalanx ; Mu had five phalanges in process of ossifica- 
tion ; Mni had also five phalanges ; Miy had three phalanges and My had 
only two. The formula of the hand in Hyperoodon is as follows : — 
Pollex. 
! 
Mj 
Ci 
Min. 
Ann. 
Med. 
Index. 
Ph 2 
Ph 3 
1 
PlU 
Ph.5 
M v 
1 
1 
M IV 
Mm 
I 
M„ 
1 
c 5 
c 4 
1 
4 
k 
\ / \ | / \ 
\ / \ i / 
ulnare intermedium ra 
pis. 
Ulna'' 
\ 
Radius 
Fig. 3. — Carpo-metacarpal region of Hyperoodon rostratus enlarged from the figure in Journ. 
Anctt. and Phys ., October 1885, vol. xx. p. 184. The dotted area represents cartilage. 
The study of the manus in the younger animal confirmed the opinion, 
previously formed, from the examination of the Hyperoodon described and 
figured in my account of the Shetland Mesoplodon, that the distal row of 
the carpus in Hyperoodon possessed five distinct carpalia, one for each 
digit. In that memoir I referred to the generalised type of carpus described 
by Gegenbaur * in the reptilian form Chelydra serjpentina, in which five 
distinct distal carpalia were present. He contrasted this with the arrange- 
* Carpus and Tarsus, 1864. 
