«/ 



eigenmann: fresh water fishes. 233 



bb. Outer lingual tooth with 3 uniform points ; two larger, inner, lingual teeth each larger 



than the outer ; supraoral plate smooth or denticulate ; no gular sack. New Zealand, 



Tasmania. stenostovms} 



aa. Labial teeth wide apart ; outer lingual tooth large with two large points on a high base ; 2 



inconspicuous lingual teeth ; supraoral plate smooth or nearly smooth ; an enormous gular 



sack even in immature specimens. Australia and South America. 2, austra/is. 



I. Geotria chilensis (Gray). 



] (Plate XXX, Figs, i and la.) 



Velasia chi/c'-.is Gray, Proc. Zool. Soc. London, 1851, 239, pi. iv, fig. 4 

 (Chili, in fresh water) ; id. List. Spec. Fish. Brit. Mus. 143, pi. i, fig. 

 4, 1851; id. Ann. & Mag. Nat. Hist, XIII, 63, 1854; Philippi, 

 Wiegm. Arch. 1863, 207. pi. x, fig. a (Valdivia). 

 Geotria cJiilensis Giinther, Cat. Fish. Brit. Mus., XIII, 509, 1870; Hutton, 

 Trans. New Zealand Inst., V, 271, 1872 and XIII, 216, 1875 ; Eigen- 

 mann & Eigenmann, Proc. U. S. Nat. Mus., XIV, 24, 1891 ; Gill, 

 Mem. Nat. Acad. Sci. Washington, VI, no, 1893; Berg, An. Mus. 

 Nac. Buenos Aires, IV, 122, 1895 (Rio de la Plata); Delfin, Cata- 

 logo de los Feces de Chile, 13, 1901. Plate, Zool. Jahrb. Suppl. V, 

 660, 1902 (Australia; New Zealand ; Valdivia; Puerto"Montt.). 

 MacropJithalmia chilensis Plate, Sb. Ges. Naturf. Fr. Berlin, Oct. 19, 

 1897, 137. (Source of the Rio Maullin from the Lago Llanquihui.) 

 Habitat: Streams of Chili and Argentina ; New Zealand and Australia. 

 "Outer lobes of the maxillary dental lamina broad with a sharp convex 

 edge, inner narrow and pointed ; mandibular lamina crescent-shaped, with 

 numerous obtuse points ; suctorial teeth in numerous series, close 

 together ; a series of larger, broad, scale-like teeth round the mandibulary 

 ""lamina ; suctorial disk not dilated, circular ; first and second dorsal fins 

 widely separate from each other ; back greenish ; sides and abdomen 

 silvery." Giinther. 



No specimens of this species were obtained by Hatcher, nor has it been 

 actually reported from any of the streams of Patagonia. Its presence in 

 New Zealand, Chili and La Plata makes its occurrence in Patagonian waters 

 certain. The fact that it has not been taken is easily accounted for by 

 its anadromic habit. So few specimens of the lampreys are known that 

 nothing is definitely settled concerning the generic or specific identity. 

 It is not improbable that Berg's Geotria chilensis is in reality an Exomegas. 



' Plate XXX, fig. 2. 



