54 FISHES FROM BRAZIL 



from the Pacific, but all of the differences are too slight to warrant their 

 separation with the material at hand. 



176. Micropogon opercularis (Quoy and Gaimard). 



Three specimens were taken at Para. 



Comparing them with specimens of Micropogon furnieri from Jamaica 

 the snout is sharper and projects farther over the mouth, the head is not so 

 deep and is more depressed above the eyes. The scales scarcely differ in size, 

 there being 6 or 7 in a vertical series between the first dorsal spine and the 

 lateral line, 8 or 9 between the first anal spine and the lateral line, and 50 

 lateral line pores. There are 26 or 27 rays in the dorsal in the Brazilian 

 specimens, and 28 or 29 in the specimens from Jamaica. 



Family CICHLID.^. 

 177. Aequidens tetramerus (Heckel). 

 A half dozen specimens were taken in the market at Para. 

 178. Cichlosoma bimaculata (Linnaeus). 



A large nmnber of specimens were taken at Ceara Mirim, Lake Papary, 

 Ceara and Lake Extremoz. The largest is 65^ inches in total lengtli. 

 Among them are 3 specimens which have only 3 anal spines, or one less 

 than the usual nimaber. 



There are two scales between the upper lateral line and the soft dorsal, 

 without the pore-bearing scale, but with a small scale at the base of the fin. 

 The lateral lines are separated by 2 scales besides the pore-bearing scales. 

 The upper lateral line covers 18 scales, and the lower one 6. 



On specimens 1^ inches in length the tip of the ventral scarcely reaches 

 past the front of the anal, and the longest rays of the soft dorsal and the 

 anal do not reach to opposite the middle caudal rays. In specimens 6 inches 

 in length the ventrals reach well past the anal spine, and the soft dorsal 

 rays reach beyond the tips of the caudal rays, while the anal rays do not 

 quite reach to the tips of the caudal rays. In none of them do the ventral 

 rays reach past the middle of the anal ("Ventral often extending to the 

 posterior end of the anal." Regan Ann. Mag. Nat. Hist. ser. 7 XVI, p. 68). 



Following is the color taken from life. The back is dark green grow- 

 ing light bluish on the side of the body. The breast and belly are dusky 

 bluish. There are 7 or 8 dark cross bars wider than the spaces between 

 them. A dark spot is usually present below the posterior part of the eye, 

 sometimes conspicuous, or sometimes nearly or quite absent. A larger, more 



