278 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



bb. Head 20-2 i.i per cent, of the length ; width of head 9.2-9.5. Lighter, no bars. 



20. taniatus. 



19. Aplochiton zebra Jenyns. 



(Plate XXXV, Figs. 5 and 5^.) 



Aplochiton zebra Jenyns, Zool. of the Voyage of the Beagle, Fishes, 

 131, pi. xxiv, fig. I (Falkland Islands). 



HaplocJiitoii zebra Giinther, Cat. Fish. Brit. Mus. V, 381, 1864 (Port 

 Louis) Gunther, Zool. Coll. H. M. S. Alert 1881, 22 (East Bay, 

 freshwaters at Tom Bay) ; id. Rep. Voy. Challenger, Shore Fishes, 

 23, 1889; Smitt, Bih. Svenska Akad. Handlinger, XXVI, Afd. IV, 

 No. 13, 1 90 1, I (Rio Tres Pasos, a tributary of Lago Toro) ; Delfin, 

 Catalogo Peces Chile 32 (Puerto Montt ; Rio Renaico ; Puerto Otuai). 



Farionella gayii, Cuvier & Valenciennes, Hist. Nat. Poiss. XXII, 508, pi. 

 640. 

 Habitat : Puerto Montt, south to the Falkland Islands. 



20. Aplochiton t^niatus Jenyns. 



(Plate XXXV, Figs. 6 and 6a.) 



ApIocJiiton t(V)iiatiis ]QX\yns, Zool. of the Voy. of the Beagle, Fishes, 132, 

 1842, pi. xxiv, fig. 2 (Mouth of freshwater streams. Gore Sound, 

 Tierra del Fuego). 



HaplocJiiton tceniatus Gunther, Cat. Fish. Brit. Mus. V, 382, 1864 (Gore 

 Sound) ; Smitt, Bih. Svenska Akad. Handl. XXVI, Afd. IV, i, 1901 

 (Lago Toro) ; Delfin, Catalogo Peces Chile, 32, 1901 ; Dollo, Voy. du 

 S. Y. Belgica, 81, 1904 (Lapataia, Beagle Channel). 

 Habitat : Southern Patagonia and Tierra del Fuego. 



Order V. ACANTHOPTERL 



Anterior vertebras unmodified ; no mesocoracoid and no interclavicles ; 

 mouth border formed by premaxillary ; shoulder girdle attached to skull 

 by a post temporal ; anterior rays of dorsal and anal usually spinous ; air 

 bladder usually without duct. 



Including the majority of marine fishes and many fresh-water species. 



