Haseman : Exi'KDrnoN to Ckntrai. South America. 339 



the mitidk' of the caudal, and \cntrals rcachinp; to llie ori^iin of anal; 

 an indistinct lateral band passing the base of a large black spot on the 

 lateral line beneath the last dorsal spines; some white to blue scales 

 in and in front of a si)ol on the upi)er half of base of caudal; fins 

 dusky, but not disliiuiK- spotted; a white streak or band between 

 the lateral line and lateral band, both in front of and behind the lateral 

 spot; three t)r four bluish lines in front of the eyes, and about three lines 

 of bluish spots on the cheeks, and some blue spots on the operculum. 

 This species appears to be more like A. sapayensis (which was 

 considered by Pellegrin to be A. rivulata) than A. zamorensis, the only 

 blue-spotted jEquidens so far reported from the basin of the Amazon, 

 but blue spots are not specific characters. Geophagus brasiliensis 

 and G. gymnogenys show all stages in the development of blue markings 

 in the same locality. If the distinction drawn by Regan is of specific 

 importance then my specimens represent good species, but I am 

 inclined to believe that when more material is collected intermediate 

 forms will be taken, and Mqiiidcns sapayensis, zamorensis, and duo- 

 piinctata will prove to be synonyms of A. rivulata. I have not seen 

 any of the other species, and as I obtained only two specimens, this 

 species may stand for the present. 



Genus Cichlasoma Swainson. 

 25. C. bimaculatum (Linnaeus). 

 No. 257S, 10 cm., Manaos, Nov. 27, 1909. 

 No. 25790-6, 5 and 9.5 cm., Prazeres, Rio Sapon, Bahia, Feb. li, 1908. 



Only one row of scales between the lateral line and the first dorsal 

 rays; all fins spotless and uniformly dark brown. 

 No. 258oa-g, 4.5 to 9.5 cm., Barreiras, Rio Grande, Bahia, Jan. 4, 1908. 



Only the smallest one has spots on the vertical fins. 

 No. 25810-0, 3 to 6.5 cm., Lagoa do Porto, Cidade da Barra, Bahia, 



Dec. 24, 1907. 

 No. 2582, 8 cm., Rio Paqui, Bahia, Nov. 14, 1907. 



Dark brown pigment under the scales along the sides. Some of the 

 Bahian examples have white spots on the scales of the sides. 

 No. 2583, 9 cm., Rio do Sonno, Goyaz, Feb. i, 1908. 



D. XV, 10; A. Ill, 9; scales 3-25-8; depth 2; head 3; pores 7; fins 

 spotless and uniformly dark brown; coloration of the body that of 

 typical specimens, from which it differs in having only three anal 

 spines, spotless fins, and only one row of scales between the lateral 

 line and the first dorsal rays. 



