eigenmann: the cheirodontinjE. 67 



situated behind the anal. The anal longer than the dorsal, and nearly as long as 

 deep; its exterior edge convex anteriorly, and subconvex posteriorly. Its anterior 

 margin is situated backwards of the posterior edge of the dorsal. 



The caudal fin, which constitutes about one-fifth of the total length, is deeply 

 forked posteriorly; its lobes are rather round and only acute at their extremities. 

 The insertion of the ventrals is on the middle of the abdomen, somewhat in advance 

 of the anterior margin of the dorsal. These fins are rather slender, with their tips 

 acute and reaching the vent. The origin of the pectorals is situated near the 

 inferior region of the thoracic belt. These fins are longer and slenderer than the 

 ventrals, their tips almost reaching the origin of the latter fins. Their anterior ray 

 is simple; the central rays are but once bifurcated, and only towards the last third 

 of their length. 



The scales are of moderate development, higher than long, subelliptical in 

 shape, sometimes very irregularly so. Ten or eleven longitudintal rows on the 

 line of the greatest depth, and six or seven rows on the peduncle of the tail. The 

 lateral line is not to be seen. 



Olivaceous brown; a silver band along the middle of the flanks, extending 

 from the upper angle of the opercular apparatus to the base of the caudal fin. The 

 cheeks, the opercles, and branchiostegal apparatus are silvery. A blackish stripe 

 along the upper edge of the silvery band of the sides. The dorsal region is minutely 

 dotted with blackish, the dots being more particularly crowded upon the outline 

 of the scales. These dots extend to the upper surface of the head, and sparingly 

 to the upper region of the thoracic and abdominal regions; also to the inferior 

 half of the peduncle of the tail. The dorsal, caudal, and anal fins are almost greyish 

 through the accumulation of the above-mentioned dots. The ventrals are unicolor; 

 the pectorals greyish upon their external margin. The abdominal region sometimes 

 exhibits an argentine reflection. 



Inhabits the lagoons in the vicinity of Santiago, Chile. 



35. Cheirodon annae McAtee. (Plate XI, fig. 1.) 

 Cheirodon annce McAtee, Proc. Acad. Nat. Sci. Phila., 1903, p. 515 (South America) ; 



Eigenmann, Reports Princeton Univ. Patagonia, Vol. Ill, 1910, p. 429. 



Habitat : Some unknown locality in South America. 



The specimens of this species were received as an exchange from the U. S. 

 National Museum. Their origin is in doubt. It is possible that they are the types 

 of C pisciculus. 



