eigenmann: fresh water fishes. 281 



22. Menidia laticlava (Cuvier & Valenciennes). 



Atherina laticlava Cuvier & Valenciennes, Hist. Nat. Poiss. X, 473, 

 1835 (Valparaiso; Laguna de la Taguatugua) ; Guichenot, in Gay 

 Hist. Chile, Zool. H, 252, 1848, and plate iv, fig. i, 1854. 



AtherinicJithys laticlava Giinther, Cat. Fish. Brit. Mus. HI, 402 (Valpa- 

 raiso ; Falkland Islands ; Port Louis) ; Cunningham, Trans. Linn. 

 Soc. London, XXVII, 471, 1871 (Punta Arenas, Port Famine, Port 

 Gallant, all on Str. of Magellan) ; Vaillant, Miss. Scient. Cap Horn, 

 Poiss. C. 22, i888"(Rio Pesca) ; Perugia, Ann. Mus. Civ. Stor. Nat. 

 di Genova, Ser. 23, X (xxx), 620, 1891 (mouth of the Rio Negro); 

 Delfin, Catalogo Peces Chile, 46, 1901. 



23. Menidia hatcheri spec. nov. 



(Plate XXXVII, Fig. 4.) 



Type: A single specimen 219 mm. to base of caudal. Lake Pueyrredon. 



Elongate; head 5>^ ; depth ^}4 ; D. vi-i, 9; A. i, 16; lat. line 68-70. 

 Snout 3.75 in head, eye 4.4, 1.6 in interorbital ; mouth sfnall, the lower 

 jaw included when closed ; snout and premaxillary equal to length of 

 eye ; snout and maxillary equals length of snout, the maxillary not reach- 

 ing the eye. Teeth in narrow bands in each jaw, persistent, those of the 

 outer jaw slightly enlarged ; no teeth on vomer. 



Spinous dorsal nearer caudal than tip of snout, its origin about over 

 tip of ventrals, its tip over anus ; origin of second dorsal over second fourth 

 of anal, its tip not reaching tip of anal. Caudal widely forked ; anal 

 emarginate, its last ray a little longer than eye, considerably longer than 

 some of the preceding rays , its longest anterior ray equal to half the dis- 

 tance between tip of snout and origin of pectoral, equal to length of ven- 

 trals ; ventrals reaching very little more than half way to anal ; pectorals 

 short, about 6}4 in the length, reaching half way to middle of ventrals. 



A silvery lateral band, margined with plumbeous above ; each scale of 

 head and body with a band of chromatophores along the margin, those 

 of the back more numerous than below ; all the fins dusky, the membranes 

 being densely pigmented. Scales cycloid. 



