PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 21 

 The synonymy of the genus and species stands somewhat as follows : — 



GENUS. 



Glyptocephalus, Gottsche, Archiv fiir Naturg. i, 1835, p. 156. — Blekcker, Compt. 

 Rend. Acad. Sci. Amsterdam, xiii.— Gill, Proc. Acad. Nat. Sci. Phila. 

 1878, p. 360. 



SPECIES. 



Giypcocephalus cynoglossus (Liune) Gill. 



Pleuronectes ocuUs a dextris totus glaier, Artedi, Geu. 14, N. 3; Mus. Ichth. No. 

 39; SyuoD. p. 31, N. 3. 



Pleuronectes cynoglossus, Linne, Syst. Nat. ed. x, i, 1758, p. 269; ed. xii, 1766, i, 

 p. 456.— GtJNTiiER, Cat. Fish. Brit. Mus. iv, 1862, p. 449. 



Glyptocephdlus cynoglossus, Gill, Proc. Acad. Nat. Sci. Phila. 1873, p. 361. 



Pleuronectes pol a, Lac^^ipede, Hist. Nat. Poiss. (Suites a Buffon), 1819, iv, p. 401. 



Platessa pola, Cuvier.— Parnell, Nat. Hist. Fish. Frith of Forth, 1838, p. 210, 

 pi. xxxviii.— Yarrell, Hist. Brit. Fish. 1841, ii, p. 315.— CouCH, Fishes 

 British Islands, iii, 1864, p. 190. 



Pleuronectes saxicoJa, Faber, Isis, 1828, p. 877. 



Ghjptoceplialus saxicola, Gottsche, I. c. 



Pleuronectes nigromanus, NiLSSOX, Prodr. Ichth. Scaud. 1832, p. 55. 



Platessa elongata, Yarrell, oj). cit. p. 318. — Guxther, op. cit. p. 450.— CorcH, 

 op. cit. p. 193. 



Glyptocephalus clongatus, Gill, oj>. cit. p. 362. 



Glyptocephalus acadianus, Gill, op. cit. p. 361, and in Baird's Report ou Fish- 

 eries of South Coast of New England, 1873, p. 794. 



Dr. Guuther suggests that the fish first cited by Fabricius {Fauna 

 Groenlajidica, p. 163). under tlie name of Pleuronectes cijnoglossus, and 

 subsequently named by him Pleuronectes ping uis {AfhnmWiug.Kongel. 

 Danske Videnskabernes Selskabs, Naturvid. og Math., Copenhagen, vol. 

 i, 1824, [).. 4.")), is probably identical witli this species. The true rela- 

 tions of the Greenland fish have already been pointed out by Professor 

 Gill (Proc. Acad. ^'at. Sci. Phila. 1864, p. 218), as well as the curious 

 misapprehension by which the .synonymy of P. pinguis and the halibut 

 has been confounded. 



The following tables give detailed measurements of twenty-three 

 specimens, and a list of all the specimens in the National Museum : — 



