Zool.— Vol. I.] 



STARK'S— SEBASTOL OB C 'S. 



369 



The parietals of Sebastes and Sebastodes do not so ovelie 

 the epiotic that the superior fork of the post-temporal is 

 wedged in between them, as is the condition in Sebastolobus 

 and Scorpama. 



Comparative Vertebral Formula. 



Species. 



Trunk 

 Ver. 



Tail Ver. 



Hypural 

 Ver. 



Total. 





9 

 11 

 11 

 12 



14 

 14 

 17 

 17 



1 



1 

 1 

 1 



24 

 26 



Sebastolobus alascanus 



Sebastes marinus 



29 

 3° 







The transverse processes are not developed very far for- 

 ward in any of the group. In Sebastolobus the first rudi- 

 mentary one is on the sixth vertebra; on the seventh in 

 Sebastes; on the fifth in Sebastodes; and in Scorpcena, which 

 has the fewest abdominal vertebrae of the four, it is on the 

 sixth. In this genus there are only three well developed 

 transverse processes. 



The transverse processes of Sebastolobus have been de- 

 scribed as pointing downward and each pair being fused for 

 nearly its whole length. This condition is shared by Scor- 

 pcena. Sebastes and Sebastodes differ from them in having 

 the processes widely diverging, pointing outward and down- 

 ward. There is a slight bridge of bone connecting each 

 pair at their bases, however, so this can probably only be 

 regarded as a difference in degree. The ankylosed condi- 

 tion of the first two interneurals and the first two inter- 

 hasmals, as described for Sebastolobus, is the same in the 

 other three genera. 



