82 BULLETIN -M, UNITED STATES NATIONAL MUSEUxM. 



luibcM. 



Width across the month at the angles 1). U 



Girth of body at iusertiou of Hukos 7.0 



Girth of body at anus 15.5 



Girth of body at geuital slit 21. 



Girth of body at a distance of 4 feet from flukes :};5. 



Girth of body behind the pectoral lins 36. 



Girth of body in front of the pectoral tins ;54. 



Scaininon states that be has seen this species as far south as Sau 

 Diego Bay, Califoruia, aud as far iiortli as Beiiiig Sea. 



The diilerences iu color aud proportions between this species aud L. 

 peronil are so great that we may expect to find dift'ereuces iu the skel- 

 etons when the latter become known. The skulls, however, as already 

 stated, show few differences. I have already referred to the shortness 

 of the right intermaxillary bone, and it may be that this is a character 

 peculiar to L. horealis. In Cuvier's figure of L. jperonii the proximal 

 end of the right intermaxilla is iu the normal position. 



TURSIO BOREALIS AND PERONII. 



Table of measurements. 



