BY J. DOUGLAS OGILBY. 425 



fissured him that he "picked it up on Brighton Beach, Hobson's 

 Bay." As, however, Klunzinger records this Lamprey from King 

 George's Sound it may be presumed that the species visits the 

 rivers of our southern coast in greater or less numbers during the 

 spawning season. 



Under the name aVporti, Johnston describes the Pouched 

 Lamprey as being " not uncommon in fresh water, Derwent, 

 North Esk, St. Leonards." 



From New Zealand I can find no record except that of Capt. 

 Hutton, who claims to have received it from Stewart Island. 



Total length to 500 millimeters. 



Type in the British Museum, as also is that of aUporti. 



Only two specimens were available to me for examination, for 

 both of which I have to thank Mr. Alexander Morton, to whose 

 generous assistance I am greatly indebted for this opportunity of 

 establishing the position of our Australian Hyperoartians on a more 

 stable basis than they have hitherto enjoyed. Both my examples 

 were collected in Tasmania and measure respectively 325 and 375 

 millimeters. 



In order to render this paper as perfect as the means at my 

 disposal permit I append the following brief diagnosis of the 

 third austrogfean genus as given by its author. 



EXOMEGAS. 



Exomegas, Gill, Proc. U.S. Nat. Mus. v. 1882, p. 524. 



" Discal teeth in concentric series, the outer containing the 

 largest teeth (about 24' on each side); lingual teeth three, large, 

 pointed, and curved, the median smallest, all standing on the 

 same base." 



Etymology : e^co, without; /xeyaj, large; in allusion to the 

 enlarged size of the outer discal teeth. 



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