110 NATUKAL HISTORY OF ARCTIC AMERICA. 



6. Gadus ogac Rich. 



Gadus ogac RICH., Faun. Bor. Amer., iii, 1836, p. 246. 



Gadus ovak RHDT., Vid. Selsk. Naturvid. og Math. Afh., deel vii, 1838. 



Gadus ogat KR$YER, Voy. en Scand., &c., pi. xix. 



21723. (1417.) $ Godthaab, Greenland, August 11, 1878. D. 13, 19, 22. A. 22, 

 21. V. 6. Length of specimen 330 millimetres. 



A black spot on the second dorsal, as long as the eye, between the 

 thirteenth and fifteenth rays. 



21724. (1418.) Godthaab, Greenland, August 11, 1878. D. 14, 18, 20. A. 20, 

 18. V. 6. Length of specimen 359 millimetres. 



The lateral line shows an interruption, measuring 22 millimetres on the 

 left side, the right being normal. The first portion of the lateral line 

 ends at the vertical through the interspace between the first and second 

 dorsals : the second portion begins at the vertical let fall from the sixth 

 ray of the second dorsal. 



21725. (1419.) 9 Godthaab, Greenland, August 11, 1878. D. 14, 17, 18. A. 19, 

 20. V. 6. Length of specimen 300 millimetres. 



Eichardson records this species at Cape Isabella, Peninsula of Boothia. 



Gadus ogac Eich., may be only a variety of G. morrhua Linn., as 

 claimed by Dr. Giinther; but after examining many specimens of the 

 latter species and comparing them with Mr. Kumlien's examples, I prefer 

 to consider these distinct from G. morrhua and identical with Eichard- 

 son's species. It may be that a larger series would lead me to the same 

 conclusion reached by Dr. Gunther. I have studied all the common cod 

 in the United States National Museum, a very large series, recently in- 

 creased by the addition of a monster weighing 100 pounds, and find that 

 Gadus ogac is distinguished from G. morrlma by several important char- 

 acters, among which are (1) a more slender caudal peduncle ; (2) a longer 

 barbel 5 (3) a larger eye; (4) a greater distance between the eyes; (5) a 

 longer pectoral ; and (6) the more advanced x^osition of the ventrals. 

 These differences may be seen in the tables of measurements, in which 

 are given the proportions of parts of the body in hundredths of the total 

 length without the caudal. 



The general color of Mr. Kumlien's specimens is very dark brown, and 

 the sides are marbled with white. 



