^h 



//>i 



^ )^m 



'"''■i^^x. 



PLATE VII. 



Figure 25. Chirostoma zirahuen Meek; type, Lake Zirahuen, Michoacan. 



Figure 26. Chirostoma patzcuaro Meek ; type, Lake Patzcuaro. 



Figure 27. Chirostoma humboldttanum ( Cuvier & X'alencienncs ) ; Lakes, X'alley 



of Mexico. 

 Figure 28. Chirostoma chapal.Ti Jordan & Snyder; type, Lake Cliapala, Jalisco. 



