FISHES OF THE GULF OF MAINE 321 



and records of distribution have been taken from the Bulletin of the Boston Society 

 of Natural History (see Firth (1931), Kendall (1931), MacCoy (1929, 1931a, 1931b, 

 1933), Schroeder (1931)); from Reports of the Newfoundland Fishery Research 

 Commission (1932-1933); and from the Proceedings and Transactions of the Nova 

 Scotian Institute of Science (Leim 1930). For the distribution of certain New 

 England sharks in South African waters, not referred to in this paper, the reader 

 is referred to Barnard (1925). For allowing us the use of unpublished notes we 

 wish to thank F. E. Firth, Dr. G. W. Jeffers, Dr. A. H. Leim, Walter H. Rich, and 

 O. E. Sette. 



The nomenclature used in this supplement is as in "Fishes of the Gulf of Maine." 



Hagfish, Myxine glutinosa Linnaeus 



Recent detailed studies of the sex organs make it certain that the hag is not 

 functionally hermaphroditic as was formerly supposed, but that in each individual 

 either the male portion of the common sex organ matures, with the female organ 

 remaining rudimentary, or vice versa (Conel, 1931). The fact that a 60 cm speci- 

 men from Georges Bank contained 30 eggs, 20-25 mm long, shows that large females 

 may produce somewhat more and slightly larger eggs than previously recorded. 



Sea lamprey, Petromyzon marinus Linnaeus 



The known range of the sea lamprey in the western Atlantic has been extended 

 northward to the west coast of Greenland (Jensen, 1926). 



Smooth dogfish, Mustelus mustelus (Linnaeus) 



The genus Mustelus is established for this species by an opinion rendered by 

 the International Commission on Zoological Nomenclature (Smithsonian Institution, 

 1926, p. 8). 



Smooth dogfish are taken so seldom in winter that capture of three by a trawler 

 off Bodie Island, N. C, in 34-45 fathoms, February 1931, is of interest. 



Great blue shark, Prionace glauca (Linnaeus) 



The International Commission on Zoological Nomenclature (Smithsonian In- 

 stitution, 1925, p. 27) has rejected Valmont's name, Galeus; consequently the correct 

 generic name of the species is Prionace Linnaeus. 



The blue shark has recently been recorded from the southwest part of the 

 Grand Bank (Rept., Nfld. Fish. Res. Lab., 1935, p. 79). Although formerly con- 

 sidered a stray in the Gulf of Maine, recent observations have shown the blue shark 

 to be common there in August and September, with occasional records for July. 

 While most often seen offshore, a number were observed and several caught by 

 J. W. Lowes during the summer of 1935 in Massachusetts Bay. 



Young ones are seldom seen along our shores, but Robert Goffin reports one only 

 20 inches long from Menemsha Bight, near Woods Hole, Mass., August 31, 1925; 

 while F. E. Firth records another, 38 inches long, taken 65 miles southeast of Highland 

 Light, Cape Cod, on October 23, 1930. 



Dusky shark, Carcharhinus obscurus (LeSueur) 



The capture of an 11-foot fish on the northeast peak of Georges Bank, August 

 10, 1931, extends the known range to the offshore banks (Firth, 1931, p. 9). 



