Fishes of the JVestern North Atlantic 151 



22 a. Tail posterior to tips of pelvics 

 with a lateral row of smaller 

 thorns on either side in addition 

 to the larger median row; at least 

 34 large thorns in young and up 

 to 50 or more in adults in median 

 row from nuchal region to first 

 dorsal fin. 



Raja Untea Fries 1838, p. 232. 

 22 b. Tail with only one (the median) 

 row of large thorns; not more 

 than 26-31 thorns in median 

 row from nuchal region to first 

 dorsal fin. 



23 a. Upper teeth in only about 

 44 series; adults with large 

 thorns on posterior parts of 

 pectorals and on outer an- 

 terior parts of disc. 



Raja hyperborea Collett 

 1878, p. 206. 

 23 b. Upper teeth in at least c,c^ 

 series; adults without large 

 thorns on posterior parts of 

 pectorals or on outer anter- 

 ior parts of disc. 



Raja jenseni Bigelow and 



Schroeder 1950, p. 213. 



20b. More than one row of large thorns along tail ; 



no one row much more conspicuous than the 



others. 



24a. Three or more rows of thorns along 

 midbelt of disc between shoulders and 

 level of axils of pectorals; first and 

 second dorsal fins confluent or only nar- 

 rowly separated, without intervening 

 thorns. 



25a. Upper teeth in at least 72*^^ series, 

 most often 90-100; does not 



63. Bigelow and Schroeder (Bull. U. S. Bur. Fish., 48, 1936: 324) gave as few as 70. While re-examination of the par- 

 ticular specimens on which this count was based showed that the number should have been stated as 80, W. Temple- 

 man reports to us the capture of one from the Grand Bank of Newfoundland with only !jj teeth. 



