98 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 
difference from No. 21492, from Cape Cod, in the National Museum, while No. 
16252, also from Cape Cod, has D. 14, L. 11, a difference of one lumbar. Some 
European specimens of JZ. longimana have 10 lumbars and others 11, while the 
number of dorsals remains constantly at 14. 
Cope compares his J. bellicosa in many particulars with JZ. longimana, and 
also occasionally mentions JZ. osphyia. The differences which he finds between JZ. 
bellicosa and M. dongimana are as follows: 
1) The whole form of the nasals is different in bellicosa and “at once dis- 
tinguish it” from dongimana. 
(2) The ramus of the mandible is more slender in éelicosa. 
(3) The elevated coronoid of bellicosa at once distinguishes it from longimana. 
(4) The head bears a greater proportion to the length of the body in dellicosa 
than in longimana. 
(5) The orbital plates of the frontal are less concave anteriorly in dellicosa. 
(6) The first rib is broader (if Rudolphi’s figures of ongimana are correct). 
(7) The pectoral fin is black externally in dellicosa, but “ entirely white in 
Arctic Megaptera.” 
We will take up these differences in the order in which they appear above, 
considering them, however, as far as possible, in connection with specimens from 
the American side of the North Atlantic. As to whether these latter are identical 
with JZ. longimanua has to be considered later. 
The nasals of JZ. bellicosa, as described and figured by Cope, though they may 
differ from those of European specimens of /ongimana, are very similar to those of 
skeleton No, 21492 from Cape Cod, Mass. The chief difference is that in the latter 
specimen they are only very imperfectly serrated proximally for articulation with 
the frontal. The nasals of Jde//icosa seem long as compared with those of No. 
21492, which is probably a skeleton of about equal size. They are 9 inches long in 
the former, 73 inches in the latter. 
The importance of the slenderness of the ramus of the mandible in bellicosa I 
cannot estimate, as I have not seen that part of the skull. Cope’s figures of the 
coronoid process indicate that that process is not larger than, or in any wise 
especially different from, the same part in the Cape Cod specimens. 
The next point of difference mentioned by Cope is that in dellicosa the head is 
longer in proportion to the body than in longimana. He gives the length of the 
cranium in the former as 9 feet and the total estimated length of the skeleton, 31 
feet 4 inches. This makes the skull 28.7 % of the total length. As the skull with 
the premaxillaries is undoubtedly some 6 inches longer, however, its proportion 
to the body would appear to be still greater. Skeleton No, 21492 from Cape Cod, 
Mass., is 33 ft. 10 in. long, and as it lacks probably the two final caudal vertebra, 
about 74 inches should be added, making a total of 34 ft.54$ in. As the skull is 
but 9 ft. 5 in., its proportion to the body is but 27.3%. It is to be observed, how- 
ever, that in the type of bellicosa the scapula, axis, and humerus indicate an indi- 
vidual at least as large as No, 21492, and hence it is open to question whether 
