PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 251 



34386 (d). $ GodhavD, Greenlaud. H. G. Dresel. D. XI, 17 ; A. 

 14. LeugtL, 2.j2 luillinieters. Interorbital width equals diameter of 

 eye. Longest dorsal spine contained 7 times, and longest dorsal ray G 

 times, in total length to caudal base. 



34386 {€). $ Godhavn, Greeidand. H. G. Dresel. D. X, 16; A. 13. 

 Length, 161 millimeters. Interorbital width contained 1^ times in di- 

 ameter of eye. Longest dorsal spine contained 5f times, and longest 

 dorsal ray 5i times, in total length to caudal base. 



In all the examples examined the length of the head is contained 2i 

 to 2| times in the total length, and the greatest height of the body 

 about 4^ times. The greatest diameter of the eye is one-sixtb of the 

 length of the head. 



The subspecies groenlandicus differs from Cottus scorplus (1) in its 

 larger size ; (2) in the greater interorbital width which in C. scorpiiis 

 seldom exceeds five-eighths of the longest diameter of the eye ; and (3) 

 in the higher spinous dorsal, the longest dorsal spine in C. grcenlandicus 

 being contained 5 to 6 times in the total length to the caudal base, 

 while in C. scorpius it is contained as much as 7 to 8 times in the same 

 length. 



The natives catch these sculpius in large numbers for their food sup- 

 ply. They use 6 or 7 fathoms of line with a 3- or 4pronged hook and 

 DO bait. 



Gymnacanthus tricuspis (Reinh). Gill. 



Cottus tricus2)is Reinhakdt, Vidensk. Selsk. Nat. Math. Afb., V, p. LII; 



GtJXTHER, Cat. Fish, Brit. Mas., II, lS(iO, p. 1(58. . 

 Phobetor tricusjjis, Kroyer, Natur. Tidskr. I, ld44, p. 263. 

 Gymnacanthus tricuspis, Gill, Cat. Fish. E. Coast N. A., 1873, p. 22. 

 Gymnacanthus instiUiger, Collett, Den uorske Nordh.-Exped., Fiske, 1880, 



p. 26. 



28629 (a). Holsteinburg, Greenland. X. P. Scudder. $ D. XII,16 ; 

 A. 18. 



28629 (b). Holsteinburg, Greenland. X. P. Scudder. i D. XII, 16; 

 A. 17. 



28629(c). Holsteinburg, Greenland. X. P. Scudder. 9D. XI, 16; 

 A. 17. 



34388. Godhavn, Greenland. H. G. Dresel. $ D. XI, 15; A. 17. 



These examples, as well as those collected in Cumberland Gulf and 

 Disco Bay by Mr. Kumlien in the summer of 1878, all differ decidedly 

 from the west coast specimens in the museum collection. 



Dr. T. H. Bean having examined Pallas's type of Cottus plstiUkjer fvo\n 

 Kamtschatka and compared numerous specimens from the Pacific and 

 Atlantic Oceans, inclines to the belief that the Greenland form of Gym. 

 nacanthus does not occur in the Pacific. It is best, therefore, to retain 

 Eeinhardt's name trtciispi.s for the Atlantic species. 



The skin is smooth with a patch of rough, scale-like tubercles in the 

 pectoral region of the body, partly concealed by the pectoral fin. The 

 lateral line, with 38 to 42 tubes, is curved under the last dorsal ray. 



