BY J. DOUGLAS OGILBY. 409 



Etymology : — Unknown. 



Type : — Velasia chilensis, Gray. 



Distribution : — Coasts and rivers of south-eastern and 

 southern Australia; ? South-western Australia; Tasmania; New 

 Zealand; Chile. 



Velasia stenostomus. 



Geotria chilensis, part., Griinther, Catal. Fish. viii. p. 509, 1870. 



Cr'eotria australis, (not Gray) Castelnau, Proc. Zool. & Acclim. 

 Soc. Vict. i. 1872, p. 227 (1873) and Edib. Fish. Vict. p. 17, 

 1873; Lucas, Proc. Roy. Soc. Vict. (2) ii. 1890, p. 47. 



Geotria chilensis, Hutton, Fish. iST. Zeal. p. 87 and (Hector) p. 



132, 1872 and Trans. N.Z. Inst. v. 1872, p. 271, pi. xii. f. 



139 (1873) and viii. 1875, p. 216 (1876) and xxii. 1889, p. 



285 (1890) ; Macleay, Proc. Linn. Soc. KS. Wales, vi. 1881, 



p. 384; Sherrin, Handb. N.Z. Fish. p. 36, 1886; Gill, Mem. 



Nat. Ac. Sc. Washingt. vi. p. 110, 1893 (not Velasia chilensis, 



Gray). 

 1 Petromt/zon sp., Kner, Voy. Novara, Fisch. p. 421, 1865. 

 ? Yaj-ra sitigularis, Castelnau, Proc. Zool. ife Acclim. Soc. Vict. 



i. 1872, p. 231 (1873); Macleay, I.e. p. 385; Lucas, I.e. 

 1 Neomordacia howittii, Castelnau, I.e. p. 232; Macleay, I.e. p. 



383; Lucas, I.e. p. 46. 



Narrow-mouthed Lamprey. 

 Disk oval, its width when fully expanded less than its length, 

 its posterior margin reaching backwards midway to the vertical 

 from the middle of the eye. Eyes rather inconspicuous, the nasal 

 tube opening between their anterior margins. The distance 

 between the extremity of the snout and the nasal opening is 16| 

 to 17:j in the total length and If to If in that preceding the first 

 branchial orifice, which is situated a little nearer to the last 

 branchial orifice than to the tip of the snout; the space between 

 the last orifice and the extremity of the snout is 5| to 5| in the 

 total length. Maxillary plate smooth; the inner cusps triangular 

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