FISHES OF SINALOA. 461 



yellow on posterior half; the back tinged with brassy olive, 

 which grows darker behind, the posterior parts pretty dis- 

 tinctly yellow; fin spines gray, the soft fins olive, the 

 fins growing dusky at tip ; scales on back and sides each 

 with a distinct black spot; iris yellow; scales above lateral 

 line much enlarged, 4 in number, 7 in an oblique series; 

 52 pores. 



The generally larger size of the scales above the lateral 

 line may possibly separate this species from the common 

 Atlantic form, Anisotremiis surinamensis. 



137. Anisotremus caesius (Jordan & Gilbert). 



This species is known only from two or three speci- 

 mens obtained by Dr. Gilbert in 1881 from Mazatlan. It 

 was not seen by us, and is doubtless rare. 



138. Anisotremus dovii (Giinther). 



This species was found by Gilbert at Mazatlan and 

 Panama, but no specimens were obtained by us. 



139. Anisotremus taeniatus Gill. Catalina. 



This species is rather common about the islands. It 

 reaches a length of about 18 inches, and in life is very 

 brilliant in color. It is seldom found in shallow water. 

 It ranges from Magdalena Bay to Panama. 



140. Pomadasis macracanthus (Giinther). Burro. 

 This species is extremely common everywhere about 



Mazatlan, It is a food fish of some importance, but the 

 flesh is rather coarse. It reaches a length of about 18 

 inches. When taken from the water it makes a loud and 

 singular noise extremel}' similiar to the noise made by the 

 donkey or burro, from which this species receives its com- 

 mon name. Every species of the genus makes some 

 noise, but in no case is it so loud as in this one. 



