THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 239 
The phalanges are incomplete in the type of JZ. osphyia. They are arranged 
on each pectoral in three series, or digits, each digit having 3 phalanges, exclusive 
of the metacarpals. Each limb, therefore, has but 9 phalanges in all, showing 
that many are lacking. Some of the pieces mounted as metacarpals are probably 
phalanges. 
The number of phalanges in the type of JZ. bellicosa is not given by Cope, and 
I was unable to find any considerable number of these bones, when examining the 
skeleton in the Philadelphia museum. Cope remarks that “the fore limbs are 
neither of them quite complete.” (29.) 
In the immature skeleton in the National Museum from Provincetown, Mass., 
(No. 16252 2) the formula for the left side is 2, 6, 6, 2.1 In No. 21492, U. S. 
N. M., also from Cape Cod, Mass., the formula is 2, 7, 6, 1, as now mounted. 
From the emarginations and tubercles on the anterior border of the pectorals 
in the Newfoundland specimens (pls. 37-40), both adult and foetal, and in the 
FIG. 79 Fic. 80. Fic. 81. 
Fic. 82. Fic. 83. 
MEGAPTERA NODOSA (BONNATERRE). AMERICAN AND EUROPEAN. STERNUM. 
Fic. 79.—StT. BARTHOLOMEW Ip., WeEsT INDIES. (FROM MALM.) Fic, 80.—(FRoM VAN BENEDEN, LOCAL- 
ITY NOT GIVEN.) Fic. 81.—TAy RIVER, SCOTLAND. ¢@. (FROM STRUTHERS.) Fic. 82.—ANTILLES. (FROM 
FIscHER.) Fic. 83.—Tyer oF M/Z. roneimana. (FROM PANDER AND D’ ALTON.) 
Cape Cod (Mass.) specimen (pl. 41, fig. 6), it is certain that the same number of 
phalanges may be counted for digit 2 in these specimens as in the Greenland 
Humpback and the European species, and for digit 8 the variation can hardly 
be more than one phalanx, with a probability that there is no difference. 
‘On the right side, the formula is actually 2, 5,5, 2, but one phalanx has obviously been 
lost from digits 3 and 4, as the irons supporting the bones project a considerable distance beyond 
the last phalanges now in position. Mr. F. A. Lucas has kindly given the formula for the fresh 
specimen, as recorded by him at the time it originally passed through his hands. It is the same 
as above, viz., 2, 6, 6, 2. 
