116 PROFESSOR STRUTHERS. 



ill B. mnscnliis, breadth llf, height 7f. At the 13th dorsal 

 the breadth exceeds the height in Megaptera by 1| inch, in B. 

 muscuhis by 3 inches. At the 7 th dorsal the excess is, in 

 Megaptera 2 inches, in B. musculus 2|. At the 4th cervical the 

 excess is, in Megaptera 1| inch, in B. musculus 4^ inches. 

 It would best express the difference to say that it is in the in- 

 creased breadth of the bodies in B. musculus. In the neck of 

 Megaptera the bodies remain nearly the same in breadth and in 

 height as at the anterior dorsal, while in B. musculus, from the 

 7th dorsal forwards the breadth goes on increasing, the height 

 but little so. This increase of the breadth of the cervical bodies 

 in B. musculus may be related to the greater development of 

 tran verse processes in it than in Megaptera. 



The less actual length of the bodies in Megaptera is seen in 

 Tables II. and III. In Table I. the length of the neck is given 

 as the same in Megaptera and B. musculus (19 inches). This 

 was taken as the vertebral columns lay together. The cervical 

 vertebrae, as now built up and standing together, have the length 

 of 17 inches in Megaptera, in B. musculus 17|. The live 

 posterior vertebrae together are 9| inches in Megaptera, in B. 

 musculus 11. This is without the fibro- cartilages. The five 

 posterior vertebrse, therefore, contribute less proportionally to 

 the length of the neck in Megaptera than in B. musculus, and 

 may be regarded, so far, as in a somewhat more reduced con- 

 dition. Regarded, however, in relation to the different total 

 length (40 feet and 50 feet) of the two carcases, not only is the 

 whole neck proportionally longer in Megaptera than in B. 

 musculus, but even the five posterior vertebra3 contribute to the 

 greater proportionate length of the neck. 



Inferior Transverse Processes. — These are present only on 

 the 3rd and 4th. The angular eminence on the 5th, where the 

 front and side of the body meet, can scarcely be termed a pro- 

 cess. At the root they occupy nearly the whole length of 

 the body, not nearer the front than the back, and have very 

 little vertical expansion where they join the body. In these 

 respects they contrast with the roots of the processes in B. 

 musculus. That of the third vertebra, 8J inches in length, 

 shows on its outer half the commencement of the tubercular 

 stage by moderate expansion of the lower part of the process. 



