CETACEA. 41 



Edinburgh, and is figured in Jardine's Naturalist's Library, vi. 

 t. 5. 



The baleen is black? Cervical vertebrae separate. Second 

 lateral process very large, third, fourth and fifth large, ringed, 

 sixth very imperfect, upper process elongate, bent down, lower 

 short, rather depressed, seventh upper process elongate, lower 

 wanting. The third and fourth cervical thinnest and of nearly 

 equal thickness, fifth rather thicker, sixth thicker still, seventh 

 thickest, and the thoracic vertebras becoming gradually thicker. 

 Ribs 15*15, first narrower at the vertebral end, second, third and 

 fourth dilated and produced on the inner side of the vertebral 

 end, rest simple. Chest-bones in three series, first simple, second 

 larger with processes, third cordate with the first pair of ribs on 

 the hinder end. Vertebrae : 10 caudal, 15 with chevron, 17 lum- 

 bar, 15 thoracic, 7 cervical. 



** The transverse apophyses of the cervical vertebra short j of 

 the third, fourth, fifth and sixth, separate at the ends. Ror- 

 qualus. 



2. PHYSALUS (RORQUALUS) BOOPS. 



The transverse apophysis of the second cervical vertebra thick, 

 short, converging, but separate at the end ; of the other cervical 

 vertebrae slender, rather longer, far apart. The upper apophysis 

 of the sixth bent down, rather elongate ; the lower one thicker, 

 shorter, and bent up at the end. 



Physalus Rorqualus Boops, Gray, Proc. Zool. Soc. 1847* 91. 

 Balaenoptera antiquorum junior?, Cat. Osteol. Spec. 142. 

 Inhab. Coast of Wales. 



a. Skeleton of animal taken on the coast of Wales, and towed 

 into Liverpool in 1846. 



The length is 38 feet ; the head is 9 feet long ; the vertebrae are 

 60 in number, and there are 1 5 pairs of simple ribs. 



The cervical vertebrae are all separate, and nearly equally de- 

 veloped ; the bodies of the cervical vertebrae are squarish oblong, 

 about -JJ- broader than high ; the spinal canal is oblong depressed, 

 twice as wide as high ; the second is twice as thick as the other, 

 with two large, broad, lateral processes, scarcely as long as half 

 the width of the vertebra, coming together at the end, but sepa- 

 rate, and leaving an oblong hole between them. The third, 

 fourth, fifth and sixth cervical vertebrae, each with superior and 

 inferior narrow lateral processes, the upper one of the third being 

 the narrowest, and gradually increasing in thickness to the sixth. 

 The lower of the fourth rather the broadest, and of the sixth the 

 thickest and most tapering at the end. The third, fourth, fifth, 



