140 



IiAL.ENOPTERID.E. 



and intermaxilla narrower than in Mer/ajitem (see Eschr. & Reinh. 

 Nordhv. t. 3. f. 3). The baleen is short, broad, triangular, rather 

 longer than broad at the base, and edged with a series of elongate, 

 unequal, bristle-like fibres, which become much thicker and more 

 rigid near the ujiper tip. It is internally formed of one or two 

 crowded layers of thick tubular iibrcs, covered on each side with a 

 thin coat of enamel, which becomes thinner and thinner near the 

 edge, where the fibres are free ; always twisted. 



Fio'. 27. 



Physalus antiquorum. Eschr. Nordhv. t. 3. f. 3. 

 Tm. 28. 



Physalus antiquorum. Cuv. Oss. Foss, t. 26. f. 3. 



" Total number of vertebrae 61-64. Ribs 15 (or 16) pairs. Orbital 

 process of frontal bone considerably narrowed at its outer end. Nasal 

 bones short, broad, deeply hollowed on their sujjerior surface and 

 anterior border. Rami of the lower jaw massive, with a very con- 

 siderable curve, and a high, pointed, curved coronoid process. Neural 

 arches of the cervical vertebrae low ; spinous processes very slightly 



