320 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



])unctiilate in the rays. Males darker in color, with the side ])lotches 

 less distinct and with the fins more dusky, and with both the dorsal 

 and the anal tipped heavily with dusky behind. 



Described from 6 

 specimens, 0.50 to 0.84 

 inch long, taken at a 

 point 20 feet below 

 the outbreak of a hot 

 spring on the eastern 

 margin of the salt lake 

 that lies between the 

 Coast and Cocopah 

 ranges, in northeast- 

 ern Lower California. 

 The salt lake is said 

 by Mr. Brown, who 

 collected the speci- 

 mens, to lie about 40 

 miles south of the in- 

 ternational line, and 

 is stated by him to be 

 I undoubtedly below 

 I sea level. The species 

 :i is oviparous. The two 

 d largest specimens are 

 ^ gravid females, the 

 largest eggs being 1 

 mm. in diameter. 

 Three examples are 

 well developed fe- 

 males, 0.66 to 0.78 

 inch in length, two of 

 them apparently ap- 

 proaching nuptial col- 

 oration. A sixth spec- 

 imen is half-grown. 



These specimens ap- 

 pear to differ from 

 other described spe- 

 cies of Lucania in their 

 shorter ventral fins 

 and in details of color- 

 ation. The type is 

 Cat. No. 57838, U.S.N.M. Cotypes are in the collection of Stanford 

 University, No. 20171. Named for Mr. Herbert Brown, of Tucson, 

 Arizona. 



