^ 



^^:/m)0 



~'~'^^\ 



'^ 



PLATE AM. 



l"'igure 21. Chikostoma jordaxi Woolman ; type, Salamanca, Mexico. 



Figure 22. Chirosto.ma labarc.p. Meek; type, Rio Lerma. Labarca, jali.sco. 



Figure IZ. Chirostoma arge Jordan & Snyder; type, Rio Wrde, Aguas Calientes, 



Mexico. 

 l-'igurc 24. Chirostoma bartoni Jordan & Everniann ; type (if CHlRo.^To^rA attex- 



u.\Tr.\i ^Icek. Lake Patzcuard, Miclmacan. 



